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WO2022005114A1 - Procédé et appareil permettant de transmettre et de recevoir un canal de liaison montante dans un système de communication sans fil - Google Patents

Procédé et appareil permettant de transmettre et de recevoir un canal de liaison montante dans un système de communication sans fil Download PDF

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Publication number
WO2022005114A1
WO2022005114A1 PCT/KR2021/008001 KR2021008001W WO2022005114A1 WO 2022005114 A1 WO2022005114 A1 WO 2022005114A1 KR 2021008001 W KR2021008001 W KR 2021008001W WO 2022005114 A1 WO2022005114 A1 WO 2022005114A1
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WIPO (PCT)
Prior art keywords
pusch
transmission
precoding
group
transmitted
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PCT/KR2021/008001
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English (en)
Korean (ko)
Inventor
김형태
강지원
박해욱
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LG Electronics Inc
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LG Electronics Inc
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Priority to US18/012,389 priority Critical patent/US20230309089A1/en
Publication of WO2022005114A1 publication Critical patent/WO2022005114A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H04W72/1263—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
    • H04W72/1268—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows of uplink data flows
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/022—Site diversity; Macro-diversity
    • H04B7/024—Co-operative use of antennas of several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0404—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas the mobile station comprising multiple antennas, e.g. to provide uplink diversity
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H04B7/0456—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H04B7/0456—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
    • H04B7/0486—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting taking channel rank into account
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0636—Feedback format
    • H04B7/0639—Using selective indices, e.g. of a codebook, e.g. pre-distortion matrix index [PMI] or for beam selection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0014—Three-dimensional division
    • H04L5/0023—Time-frequency-space
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signalling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H04W72/232—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal the control data signalling from the physical layer, e.g. DCI signalling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0044—Allocation of payload; Allocation of data channels, e.g. PDSCH or PUSCH

Definitions

  • the present disclosure relates to a wireless communication system, and more particularly, to a method and apparatus for transmitting and receiving uplink data/control channel in a wireless communication system.
  • the mobile communication system has been developed to provide a voice service while ensuring user activity.
  • the mobile communication system has expanded its scope to not only voice but also data service.
  • an explosive increase in traffic causes a shortage of resources and users demand a higher speed service, so a more advanced mobile communication system is required. have.
  • next-generation mobile communication system requirements are largely to accommodate explosive data traffic, to dramatically increase the transmission rate per user, to accommodate a significantly increased number of connected devices, to support very low end-to-end latency, and to support high energy efficiency.
  • Dual Connectivity Massive Multiple Input Multiple Output (MIMO), In-band Full Duplex, Non-Orthogonal Multiple Access (NOMA), Super Wideband
  • MIMO Massive Multiple Input Multiple Output
  • NOMA Non-Orthogonal Multiple Access
  • An object of the present disclosure is to provide a method and apparatus for transmitting and receiving an uplink control/data channel in a wireless communication system supporting multiple multi-transmission reception point (TRP).
  • TRP multiple multi-transmission reception point
  • a technical problem of the present disclosure is a method and apparatus for determining a rank/precoder of an uplink control/data channel transmitted to each TRP in a wireless communication system supporting multiple multi-transmission reception point (TRP) is to provide
  • a method for transmitting a physical uplink shared channel (PUSCH) includes: receiving downlink control information (DCI) for PUSCH scheduling from a base station; and transmitting the PUSCH to the base station based on a transmission precoding matrix indicator (TPMI) and a transmission rank given by the DCI.
  • the PUSCH is transmitted on a plurality of transmission occasions (TO), the plurality of TOs are composed of N (N is a natural number) TO groups including one or more TOs, and the PUSCH is a TO in which the PUSCH is transmitted. It is transmitted based on the precoding vector group associated with the group, and the precoding vector group may be determined as one or more precoding vectors constituting the precoding matrix indicated by the TPMI.
  • a method for receiving a physical uplink shared channel (PUSCH) includes: transmitting downlink control information (DCI) for PUSCH scheduling to a UE; and receiving the PUSCH from the terminal based on a transmission precoding matrix indicator (TPMI) and a transmission rank given by the DCI.
  • the PUSCH is transmitted on a plurality of transmission occasions (TO), the plurality of TOs are composed of N (N is a natural number) TO groups including one or more TOs, and the PUSCH is a TO in which the PUSCH is transmitted. It is transmitted based on the precoding vector group associated with the group, and the precoding vector group may be determined as one or more precoding vectors constituting the precoding matrix indicated by the TPMI.
  • a rank/precoder suitable for the uplink channel situation of each TRP in a wireless communication system supporting multi-transmission reception point (TRP) transmission/reception for uplink channel Reliability can be increased.
  • TRP transmission reception point
  • FIG. 1 illustrates a structure of a wireless communication system to which the present disclosure can be applied.
  • FIG. 2 illustrates a frame structure in a wireless communication system to which the present disclosure can be applied.
  • FIG. 3 illustrates a resource grid in a wireless communication system to which the present disclosure can be applied.
  • FIG. 4 illustrates a physical resource block in a wireless communication system to which the present disclosure can be applied.
  • FIG. 5 illustrates a slot structure in a wireless communication system to which the present disclosure can be applied.
  • FIG. 6 illustrates physical channels used in a wireless communication system to which the present disclosure can be applied and a general signal transmission/reception method using them.
  • FIG. 7 illustrates a multiple TRP transmission scheme in a wireless communication system to which the present disclosure can be applied.
  • FIG. 8 illustrates a signaling procedure between a network and a terminal according to an embodiment of the present disclosure.
  • FIG 9 illustrates an operation of a terminal for PUSCH transmission and reception according to an embodiment of the present disclosure.
  • FIG. 10 illustrates an operation of a terminal for PUSCH transmission and reception according to an embodiment of the present disclosure.
  • FIG. 11 illustrates a block diagram of a wireless communication device according to an embodiment of the present disclosure.
  • a component when it is said that a component is “connected”, “coupled” or “connected” to another component, it is not only a direct connection relationship, but also an indirect connection relationship in which another component exists between them. may also include. Also in this disclosure the terms “comprises” or “having” specify the presence of a recited feature, step, operation, element and/or component, but one or more other features, steps, operations, elements, components and/or The presence or addition of groups thereof is not excluded.
  • first and second are used only for the purpose of distinguishing one component from other components and are not used to limit the components, unless otherwise specified. It does not limit the order or importance between them. Accordingly, within the scope of the present disclosure, a first component in one embodiment may be referred to as a second component in another embodiment, and similarly, a second component in one embodiment is referred to as a first component in another embodiment. can also be called
  • the present disclosure describes a wireless communication network or a wireless communication system as a target, and an operation performed in the wireless communication network controls the network and transmits or receives a signal from a device (eg, a base station) having jurisdiction over the wireless communication network. It may be made in the process of receiving (receive), or it may be made in the process of transmitting or receiving a signal from a terminal coupled to a corresponding wireless network to a network or between terminals.
  • a device eg, a base station
  • transmitting or receiving a channel includes the meaning of transmitting or receiving information or a signal through a corresponding channel.
  • transmitting the control channel means transmitting control information or a signal through the control channel.
  • transmit a data channel means to transmit data information or a signal over the data channel.
  • downlink means communication from a base station to a terminal
  • uplink means communication from a terminal to a base station
  • DL downlink
  • UL uplink
  • the transmitter may be a part of the base station
  • the receiver may be a part of the terminal
  • the transmitter may be a part of the terminal
  • the receiver may be a part of the base station.
  • the base station may be represented as a first communication device
  • the terminal may be represented as a second communication device.
  • Base station is a fixed station (fixed station), Node B, eNB (evolved-NodeB), gNB (Next Generation NodeB), BTS (base transceiver system), access point (AP: Access Point), network (5G) network), AI (Artificial Intelligence) system/module, RSU (road side unit), robot (robot), drone (UAV: Unmanned Aerial Vehicle), AR (Augmented Reality) device, VR (Virtual Reality) device, etc.
  • BS Base Station
  • Node B Node B
  • eNB evolved-NodeB
  • gNB Next Generation NodeB
  • BTS base transceiver system
  • AP Access Point
  • 5G Fifth Generation
  • AI Artificial Intelligence
  • RSU road side unit
  • robot robot
  • drone UAV: Unmanned Aerial Vehicle
  • AR Algmented Reality
  • VR Virtual Reality
  • the terminal may be fixed or have mobility, UE (User Equipment), MS (Mobile Station), UT (user terminal), MSS (Mobile Subscriber Station), SS (Subscriber Station), AMS (Advanced Mobile) Station), WT (Wireless terminal), MTC (Machine-Type Communication) device, M2M (Machine-to-Machine) device, D2D (Device-to-Device) device, vehicle, RSU (road side unit), It may be replaced by terms such as a robot, an artificial intelligence (AI) module, an unmanned aerial vehicle (UAV), an augmented reality (AR) device, and a virtual reality (VR) device.
  • AI artificial intelligence
  • UAV unmanned aerial vehicle
  • AR augmented reality
  • VR virtual reality
  • CDMA may be implemented with a radio technology such as Universal Terrestrial Radio Access (UTRA) or CDMA2000.
  • TDMA may be implemented with a radio technology such as Global System for Mobile communications (GSM)/General Packet Radio Service (GPRS)/Enhanced Data Rates for GSM Evolution (EDGE).
  • GSM Global System for Mobile communications
  • GPRS General Packet Radio Service
  • EDGE Enhanced Data Rates for GSM Evolution
  • OFDMA may be implemented with a radio technology such as IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802-20, Evolved UTRA (E-UTRA), and the like.
  • UTRA is part of the Universal Mobile Telecommunications System (UMTS).
  • 3GPP 3rd Generation Partnership Project
  • Long Term Evolution is a part of Evolved UMTS (E-UMTS) using E-UTRA and LTE-A (Advanced)/LTE-A pro is an evolved version of 3GPP LTE.
  • 3GPP NR New Radio or New Radio Access Technology is an evolved version of 3GPP LTE/LTE-A/LTE-A pro.
  • LTE refers to technology after 3GPP Technical Specification (TS) 36.xxx Release 8.
  • TS Technical Specification
  • LTE technology after 3GPP TS 36.xxx Release 10 is referred to as LTE-A
  • LTE technology after 3GPP TS 36.xxx Release 13 is referred to as LTE-A pro
  • 3GPP NR refers to technology after TS 38.xxx Release 15.
  • LTE/NR may be referred to as a 3GPP system.
  • "xxx" stands for standard document detail number.
  • LTE/NR may be collectively referred to as a 3GPP system.
  • TS 36.211 physical channels and modulation
  • TS 36.212 multiplex and channel coding
  • TS 36.213 physical layer procedures
  • TS 36.300 overall description
  • TS 36.331 radio resource control
  • TS 38.211 physical channels and modulation
  • TS 38.212 multiplexing and channel coding
  • TS 38.213 physical layer procedures for control
  • TS 38.214 physical layer procedures for data
  • TS 38.300 Overall description of NR and New Generation-Radio Access Network (NG-RAN)
  • TS 38.331 Radio Resource Control Protocol Specification
  • channel quality indicator channel quality indicator
  • channel state information - reference signal resource indicator channel state information - reference signal resource indicator
  • channel state information channel state information
  • channel state information - interference measurement channel state information - interference measurement
  • channel state information - reference signal channel state information - reference signal
  • demodulation reference signal demodulation reference signal
  • interleaved frequency division multiple access (interleaved frequency division multiple access)
  • first layer reference signal received power (Layer 1 reference signal received power)
  • first layer reference signal received quality (Layer 1 reference signal received quality)
  • PDCCH physical downlink control channel (physical downlink control channel)
  • precoding matrix indicator precoding matrix indicator
  • radio resource control radio resource control
  • SSB (or SS / PBCH block): synchronization signal block (including primary synchronization signal (PSS), secondary synchronization signal (SSS: secondary synchronization signal) and physical broadcast channel (PBCH: physical broadcast channel))
  • PSS primary synchronization signal
  • SSS secondary synchronization signal
  • PBCH physical broadcast channel
  • tracking reference signal tracking reference signal
  • NR is an expression showing an example of 5G RAT.
  • a new RAT system including NR uses an OFDM transmission scheme or a similar transmission scheme.
  • the new RAT system may follow OFDM parameters different from those of LTE.
  • the new RAT system may support a larger system bandwidth (eg, 100 MHz) while following the existing numerology of LTE/LTE-A.
  • one cell may support a plurality of numerologies. That is, terminals operating in different numerology can coexist in one cell.
  • Numerology corresponds to one subcarrier spacing in the frequency domain.
  • different numerology can be defined.
  • FIG. 1 illustrates a structure of a wireless communication system to which the present disclosure can be applied.
  • NG-RAN is NG-RA (NG-Radio Access) user plane (ie, new access stratum (AS) sublayer / Packet Data Convergence Protocol (PDCP) / RLC (Radio Link Control) / MAC / PHY) and gNBs that provide control plane (RRC) protocol termination for the UE.
  • the gNBs are interconnected through an Xn interface.
  • the gNB is also connected to a New Generation Core (NGC) through an NG interface. More specifically, the gNB is connected to an Access and Mobility Management Function (AMF) through an N2 interface and a User Plane Function (UPF) through an N3 interface.
  • AMF Access and Mobility Management Function
  • UPF User Plane Function
  • FIG. 2 illustrates a frame structure in a wireless communication system to which the present disclosure can be applied.
  • An NR system can support multiple numerologies.
  • numerology may be defined by subcarrier spacing and cyclic prefix (CP) overhead.
  • CP cyclic prefix
  • a plurality of subcarrier spacings may be derived by scaling the basic (reference) subcarrier spacing to an integer N (or ⁇ ).
  • the numerology used can be selected independently of the frequency band, although it is assumed that very low subcarrier spacing is not used at very high carrier frequencies.
  • various frame structures according to multiple numerologies may be supported.
  • OFDM numerology and frame structure that can be considered in the NR system will be described.
  • a number of OFDM numerologies supported in the NR system may be defined as shown in Table 1 below.
  • NR supports multiple numerology (or subcarrier spacing (SCS)) to support various 5G services. For example, when SCS is 15kHz, it supports a wide area in traditional cellular bands, and when SCS is 30kHz/60kHz, dense-urban, lower latency and a wider carrier bandwidth, and when the SCS is 60 kHz or higher, a bandwidth greater than 24.25 GHz to overcome phase noise.
  • the NR frequency band is defined as two types of frequency ranges (FR1, FR2).
  • FR1 and FR2 may be configured as shown in Table 2 below.
  • FR2 may mean a millimeter wave (mmW: millimeter wave).
  • ⁇ f max 480 ⁇ 10 3 Hz
  • N f 4096.
  • slots are numbered in increasing order of n s ⁇ ⁇ 0,..., N slot subframe, ⁇ -1 ⁇ within the subframe, and within the radio frame They are numbered in increasing order of n s,f ⁇ ⁇ 0,..., N slot frame, ⁇ -1 ⁇ .
  • One slot is made up of consecutive OFDM symbols of N symb slot, N symb slot is determined according to the CP.
  • the start of the slot n s ⁇ in a subframe is temporally aligned with the start of the OFDM symbol n s ⁇ N symb slot in the same subframe. Not all terminals can transmit and receive at the same time, which means that all OFDM symbols of a downlink slot or an uplink slot cannot be used.
  • Table 3 shows the number of OFDM symbols per slot (N symb slot), the number of slots per radio frame (N slot frame, ⁇ ), and the number of slots per subframe (N slot subframe, ⁇ ) in the general CP
  • Table 4 denotes the number of OFDM symbols per slot, the number of slots per radio frame, and the number of slots per subframe in the extended CP.
  • one subframe may include four slots.
  • One subframe ⁇ 1,2,4 ⁇ slots shown in FIG. 2 is an example, and the number of slot(s) that can be included in one subframe is defined as shown in Table 3 or Table 4.
  • a mini-slot may contain 2, 4 or 7 symbols, or may contain more or fewer symbols.
  • an antenna port antenna port
  • resource grid resource grid
  • resource element resource element
  • resource block resource block
  • carrier part carrier part
  • an antenna port is defined such that a channel on which a symbol on an antenna port is carried can be inferred from a channel on which another symbol on the same antenna port is carried.
  • the two antenna ports are QC/QCL (quasi co-located or QC/QCL) It can be said that there is a quasi co-location) relationship.
  • the wide range characteristic includes one or more of delay spread, Doppler spread, frequency shift, average received power, and received timing.
  • FIG. 3 illustrates a resource grid in a wireless communication system to which the present disclosure can be applied.
  • the resource grid is composed of N RB ⁇ N sc RB subcarriers in the frequency domain and that one subframe is composed of 14 ⁇ 2 ⁇ OFDM symbols, but limited to this it is not going to be
  • a transmitted signal is described by one or more resource grids consisting of N RB ⁇ N sc RB subcarriers and OFDM symbols of 2 ⁇ N symb ( ⁇ ).
  • N RB ⁇ N RB max, ⁇ The N RB max, ⁇ represents the maximum transmission bandwidth, which may vary between uplink and downlink as well as numerologies.
  • one resource grid may be configured for each ⁇ and each antenna port p.
  • Each element of the resource grid for ⁇ and antenna port p is referred to as a resource element, and is uniquely identified by an index pair (k,l').
  • l' 0,...,2 ⁇ N symb ( ⁇ ) -1 is a symbol in a subframe indicates the location of
  • an index pair (k,l) is used.
  • l 0,...,N symb ⁇ -1 .
  • a resource element (k,l') for ⁇ and an antenna port p corresponds to a complex value a k,l' (p, ⁇ ) .
  • indices p and ⁇ may be dropped, so that the complex value is a k,l' (p) or a k,l' can be
  • Point A serves as a common reference point of the resource block grid and is obtained as follows.
  • - OffsetToPointA for the primary cell (PCell: Primary Cell) downlink represents a frequency offset between point A and the lowest subcarrier of the lowest resource block overlapping the SS/PBCH block used by the UE for initial cell selection. It is expressed in resource block units assuming a 15 kHz subcarrier spacing for FR1 and a 60 kHz subcarrier spacing for FR2.
  • - absoluteFrequencyPointA indicates the frequency-position of point A expressed as in ARFCN (absolute radio-frequency channel number).
  • Common resource blocks are numbered upwards from 0 in the frequency domain for the subcarrier interval setting ⁇ .
  • the center of subcarrier 0 of common resource block 0 for subcarrier interval setting ⁇ coincides with 'point A'.
  • the relationship between the common resource block number n CRB ⁇ and the resource element (k,l) for the subcarrier interval setting ⁇ in the frequency domain is given by Equation 1 below.
  • Physical resource blocks are numbered from 0 to N BWP,i size, ⁇ -1 in the bandwidth part (BWP: bandwidth part), and i is the number of the BWP.
  • BWP bandwidth part
  • i the number of the BWP.
  • Equation 2 The relationship between the physical resource block n PRB and the common resource block n CRB in BWP i is given by Equation 2 below.
  • N BWP,i start, ⁇ is a common resource block in which BWP starts relative to common resource block 0.
  • FIG. 4 illustrates a physical resource block in a wireless communication system to which the present disclosure can be applied.
  • FIG. 5 illustrates a slot structure in a wireless communication system to which the present disclosure can be applied.
  • a slot includes a plurality of symbols in the time domain. For example, in the case of a normal CP, one slot includes 7 symbols, but in the case of an extended CP, one slot includes 6 symbols.
  • the carrier includes a plurality of subcarriers in the frequency domain.
  • a resource block (RB) is defined as a plurality of (eg, 12) consecutive subcarriers in the frequency domain.
  • a bandwidth part (BWP) is defined as a plurality of contiguous (physical) resource blocks in the frequency domain, and may correspond to one numerology (eg, SCS, CP length, etc.).
  • a carrier wave may include a maximum of N (eg, 5) BWPs. Data communication is performed through the activated BWP, and only one BWP can be activated for one terminal.
  • Each element in the resource grid is referred to as a resource element (RE), and one complex symbol may be mapped.
  • RE resource element
  • the NR system may support up to 400 MHz per one component carrier (CC). If a terminal operating in such a wideband CC always operates with a radio frequency (RF) chip for the entire CC turned on, battery consumption of the terminal may increase.
  • a radio frequency (RF) chip for the entire CC turned on, battery consumption of the terminal may increase.
  • RF radio frequency
  • different numerology eg, subcarrier spacing, etc.
  • the capability for the maximum bandwidth may be different for each terminal.
  • the base station may instruct the terminal to operate only in a partial bandwidth rather than the entire bandwidth of the broadband CC, and the partial bandwidth is defined as a bandwidth part (BWP: bandwidth part) for convenience.
  • the BWP may consist of consecutive RBs on the frequency axis, and may correspond to one numerology (eg, subcarrier interval, CP length, slot/mini-slot interval).
  • the base station may set a plurality of BWPs even within one CC configured for the terminal. For example, in the PDCCH monitoring slot, a BWP occupying a relatively small frequency domain may be configured, and a PDSCH indicated by the PDCCH may be scheduled on a larger BWP.
  • some UEs may be configured as a different BWP for load balancing.
  • a part of the entire bandwidth may be excluded and both BWPs may be configured in the same slot. That is, the base station may configure at least one DL/UL BWP to the terminal associated with the broadband CC.
  • the base station may activate at least one DL/UL BWP among the DL/UL BWP(s) configured at a specific time (by L1 signaling, MAC CE (Control Element) or RRC signaling, etc.).
  • the base station may indicate switching to another configured DL/UL BWP (by L1 signaling or MAC CE or RRC signaling, etc.).
  • the timer value expires based on the timer, it may be switched to a predetermined DL/UL BWP.
  • the activated DL/UL BWP is defined as an active DL/UL BWP.
  • the terminal may not receive the configuration for the DL/UL BWP in a situation such as when the terminal is performing an initial access process or before the RRC connection is set up, in this situation, the terminal This assumed DL/UL BWP is defined as the first active DL/UL BWP.
  • FIG. 6 illustrates physical channels used in a wireless communication system to which the present disclosure can be applied and a general signal transmission/reception method using them.
  • a terminal receives information from a base station through a downlink, and the terminal transmits information to a base station through an uplink.
  • Information transmitted and received between the base station and the terminal includes data and various control information, and various physical channels exist according to the type/use of the information they transmit and receive.
  • the terminal When the terminal is powered on or newly enters a cell, the terminal performs an initial cell search operation such as synchronizing with the base station (S601). To this end, the terminal receives a primary synchronization signal (PSS) and a secondary synchronization channel (SSS) from the base station to synchronize with the base station, and to obtain information such as a cell identifier (ID: Identifier). can Thereafter, the terminal may receive a physical broadcast channel (PBCH) from the base station to obtain intra-cell broadcast information. Meanwhile, the UE may receive a downlink reference signal (DL RS) in the initial cell search step to check the downlink channel state.
  • PSS primary synchronization signal
  • SSS secondary synchronization channel
  • ID cell identifier
  • the terminal may receive a physical broadcast channel (PBCH) from the base station to obtain intra-cell broadcast information.
  • PBCH physical broadcast channel
  • the UE may receive a downlink reference signal (DL RS) in the initial cell search step to check the downlink channel state.
  • the UE After completing the initial cell search, the UE acquires more specific system information by receiving a Physical Downlink Control Channel (PDCCH) and a Physical Downlink Control Channel (PDSCH) according to information carried on the PDCCH. It can be done (S602).
  • PDCCH Physical Downlink Control Channel
  • PDSCH Physical Downlink Control Channel
  • the terminal may perform a random access procedure (RACH) for the base station (steps S603 to S606).
  • RACH random access procedure
  • the UE transmits a specific sequence as a preamble through a Physical Random Access Channel (PRACH) (S603 and S605), and receives a response message to the preamble through the PDCCH and the corresponding PDSCH ( S604 and S606).
  • PRACH Physical Random Access Channel
  • a contention resolution procedure may be additionally performed.
  • the UE After performing the procedure as described above, the UE performs PDCCH/PDSCH reception (S607) and a physical uplink shared channel (PUSCH)/physical uplink control channel (PUCCH) as a general uplink/downlink signal transmission procedure.
  • Physical Uplink Control Channel) transmission (S608) may be performed.
  • the UE receives downlink control information (DCI) through the PDCCH.
  • DCI downlink control information
  • the DCI includes control information such as resource allocation information for the terminal, and has a different format depending on the purpose of its use.
  • the control information that the terminal transmits to the base station through the uplink or the terminal receives from the base station is a downlink/uplink ACK/NACK (Acknowledgment/Non-Acknowledgment) signal, a channel quality indicator (CQI), and a precoding matrix (PMI). Indicator), RI (Rank Indicator), and the like.
  • the UE may transmit the above-described control information such as CQI/PMI/RI through PUSCH and/or PUCCH.
  • Table 5 shows an example of a DCI format in the NR system.
  • DCI format uses 0_0 Scheduling of PUSCH in one cell 0_1 Scheduling of one or multiple PUSCHs in one cell, or indication of cell group (CG) downlink feedback information to the UE 0_2 Scheduling of PUSCH in one cell 1_0 Scheduling of PDSCH in one DL cell 1_1 Scheduling of PDSCH in one cell 1_2 Scheduling of PDSCH in one cell
  • DCI formats 0_0, 0_1 and 0_2 are resource information related to PUSCH scheduling (eg, UL/SUL (Supplementary UL), frequency resource allocation, time resource allocation, frequency hopping, etc.), transport block ( TB: Transport Block) related information (eg, MCS (Modulation Coding and Scheme), NDI (New Data Indicator), RV (Redundancy Version), etc.), HARQ (Hybrid - Automatic Repeat and request) related information (eg, , process number, DAI (Downlink Assignment Index), PDSCH-HARQ feedback timing, etc.), multi-antenna related information (eg, DMRS sequence initialization information, antenna port, CSI request, etc.), power control information (eg, PUSCH power control, etc.), and control information included in each DCI format may be predefined.
  • PUSCH scheduling eg, UL/SUL (Supplementary UL), frequency resource allocation, time resource allocation, frequency hopping, etc.
  • DCI format 0_0 is used for scheduling PUSCH in one cell.
  • Information included in DCI format 0_0 is cyclic redundancy check (CRC) by Cell Radio Network Temporary Identifier (C-RNTI) or Configured Scheduling RNTI (CS-RNTI) or Modulation Coding Scheme Cell RNTI (MCS-C-RNTI). ) is scrambled and transmitted.
  • CRC cyclic redundancy check
  • C-RNTI Cell Radio Network Temporary Identifier
  • CS-RNTI Configured Scheduling RNTI
  • MCS-C-RNTI Modulation Coding Scheme Cell RNTI
  • DCI format 0_1 is used to indicate to the UE the scheduling of one or more PUSCHs or configured grant (CG: configure grant) downlink feedback information in one cell.
  • Information included in DCI format 0_1 is CRC scrambled and transmitted by C-RNTI or CS-RNTI or SP-CSI-RNTI (Semi-Persistent CSI RNTI) or MCS-C-RNTI.
  • DCI format 0_2 is used for scheduling PUSCH in one cell.
  • Information included in DCI format 0_2 is CRC scrambled and transmitted by C-RNTI or CS-RNTI or SP-CSI-RNTI or MCS-C-RNTI.
  • DCI formats 1_0, 1_1 and 1_2 are resource information related to PDSCH scheduling (eg, frequency resource allocation, time resource allocation, virtual resource block (VRB)-physical resource block (PRB) mapping, etc.), transport block (TB) related information (eg, MCS, NDI, RV, etc.), HARQ related information (eg, process number, DAI, PDSCH-HARQ feedback timing, etc.), multi-antenna related information (eg, antenna port) , transmission configuration indicator (TCI), sounding reference signal (SRS) request, etc.), PUCCH-related information (eg, PUCCH power control, PUCCH resource indicator, etc.), and control information included in each DCI format is It can be predefined.
  • PDSCH scheduling eg, frequency resource allocation, time resource allocation, virtual resource block (VRB)-physical resource block (PRB) mapping, etc.
  • transport block (TB) related information eg, MCS, NDI, RV, etc.
  • HARQ related information eg
  • DCI format 1_0 is used for scheduling the PDSCH in one DL cell.
  • Information included in DCI format 1_0 is CRC scrambled and transmitted by C-RNTI, CS-RNTI, or MCS-C-RNTI.
  • DCI format 1_1 is used for scheduling PDSCH in one cell.
  • Information included in DCI format 1_1 is CRC scrambled and transmitted by C-RNTI, CS-RNTI, or MCS-C-RNTI.
  • DCI format 1_2 is used for scheduling PDSCH in one cell.
  • Information included in DCI format 1_2 is CRC scrambled and transmitted by C-RNTI, CS-RNTI, or MCS-C-RNTI.
  • An antenna port is defined such that a channel on which a symbol on an antenna port is carried can be inferred from a channel on which another symbol on the same antenna port is carried.
  • the two antenna ports are QC/QCL (quasi co-located or quasi co-location) ) can be said to be in a relationship.
  • the channel characteristics include delay spread, Doppler spread, frequency/Doppler shift, average received power, and received timing/average delay. delay), and includes at least one of a spatial reception parameter (Spatial Rx parameter).
  • the spatial Rx parameter refers to a spatial (reception) channel characteristic parameter such as an angle of arrival.
  • the UE In order for the UE to decode the PDSCH according to the detected PDCCH having the DCI intended for the UE and the given serving cell, it may be set as a list of up to M TCI-State settings in the upper layer parameter PDSCH-Config.
  • the M depends on the UE capability.
  • Each TCI-State includes parameters for establishing a quasi co-location relationship between one or two DL reference signals and the DM-RS port of the PDSCH.
  • the quasi co-location relationship is set with the upper layer parameter qcl-Type1 for the first DL RS and qcl-Type2 (if set) for the second DL RS.
  • the QCL type is not the same regardless of whether the reference is the same DL RS or different DL RSs.
  • the quasi co-location type (type) corresponding to each DL RS is given by the higher layer parameter qcl-Type of QCL-Info, and may take one of the following values:
  • the corresponding NZP CSI-RS antenna port(s) are QCL-Type A specific TRS and QCL-Type D specific SSB and QCL can be indicated/set.
  • the UE receiving this instruction/configuration receives the corresponding NZP CSI-RS using the Doppler and delay values measured in QCL-TypeA TRS, and applies the reception beam used for QCL-TypeD SSB reception to the corresponding NZP CSI-RS reception. can do.
  • the UE may receive an activation command by MAC CE signaling used to map up to 8 TCI states to a codepoint of the DCI field 'Transmission Configuration Indication'.
  • Multi-TRP Multi-TRP
  • CoMP Coordinated Multi Point
  • a plurality of base stations exchange channel information (eg, RI/CQI/PMI/layer indicator (LI), etc.) fed back from the terminal with each other (eg, It refers to a method of effectively controlling interference by using the X2 interface) or using the cooperative transmission to the terminal.
  • CoMP is joint transmission (JT), coordinated scheduling (CS), coordinated beamforming (CB), dynamic point selection (DPS), dynamic point blocking ( DPB: Dynamic Point Blocking).
  • the M-TRP transmission method in which M TRPs transmit data to one terminal is largely i) eMBB M-TRP transmission, which is a method to increase the transmission rate, and ii) URLLC M, which is a method for increasing the reception success rate and reducing latency -TRP transmission can be distinguished.
  • the M-TRP transmission method is i) M-DCI (multiple DCI) based M-TRP transmission in which each TRP transmits a different DCI, and ii) S-DCI in which one TRP transmits DCI It can be divided into (single DCI)-based M-TRP transmission.
  • M-DCI multiple DCI
  • S-DCI single DCI
  • S-DCI-based M-TRP transmission since all scheduling information for data transmitted by the M TRP must be delivered to the UE through one DCI, dynamic cooperation between the two TRPs is ideal. It can be used in a backhaul (ideal BH: ideal BackHaul) environment.
  • the UE recognizes a PUSCH (or PUCCH) that transmits a PUSCH (or PUCCH) scheduled by DCI received with a different control resource set (CORESET) (or CORESET belonging to a different CORESET group) with different TRPs (or PUCCH). Or, it can be recognized as a PDSCH (or PDCCH) of a different TRP.
  • the method for UL transmission eg, PUSCH/PUCCH
  • UL transmission eg, PUSCH/PUCCH
  • UL transmission eg, PUSCH/PUCCH
  • the CORESET group identifier (group ID) described / mentioned in the present disclosure may mean an index / identification information (eg, ID) for distinguishing CORESET for each TRP / panel. have.
  • the CORESET group may be a group/union of CORESETs classified by an index/identification information (eg, ID)/the CORESET group ID for discriminating a CORESET for each TRP/panel.
  • the CORESET group ID may be specific index information defined in CORSET configuration.
  • the CORESET group may be set/indicated/defined by an index defined in the CORESET configuration for each CORESET.
  • the CORESET group ID may mean an index/identification information/indicator for classification/identification between CORESETs set/related to each TRP/panel.
  • the CORESET group ID described/mentioned in the present disclosure may be expressed by being replaced with a specific index/specific identification information/specific indicator for classification/identification between CORESETs set/related to each TRP/panel.
  • the CORESET group ID that is, a specific index/specific identification information/specific indicator for classification/identification between CORESETs set/associated in each TRP/panel is higher layer signaling (eg, RRC signaling)/second It may be configured/indicated to the UE through layer signaling (L2 signaling, eg, MAC-CE)/first layer signaling (L1 signaling, eg, DCI). For example, it may be set/instructed so that PDCCH detection is performed for each TRP/panel (ie, for each TRP/panel belonging to the same CORESET group) in a corresponding CORESET group unit.
  • L2 signaling eg, MAC-CE
  • L1 signaling eg, DCI
  • And/or uplink control information eg, CSI, HARQ-A/N (ACK/NACK), SR ( scheduling request) and/or uplink physical channel resources (eg, PUCCH/PRACH/SRS resources) may be set/instructed to be managed/controlled separately.
  • And/or HARQ A/N (process/retransmission) for PDSCH/PUSCH scheduled for each TRP/panel for each CORESET group (ie, for each TRP/panel belonging to the same CORESET group) may be managed.
  • an upper layer parameter a ControlResourceSet information element (IE), is used to set a time/frequency control resource set (CORESET).
  • the control resource set (CORESET) may be related to the detection and reception of downlink control information.
  • the ControlResourceSet IE is a CORESET-related ID (eg, controlResourceSetID) / index of the CORESET pool for CORESET (eg, CORESETPoolIndex) / time / frequency resource setting of CORESET / TCI information related to CORESET, etc. may include
  • the index of the CORESET pool (eg, CORESETPoolIndex) may be set to 0 or 1.
  • a CORESET group may correspond to a CORESET pool
  • a CORESET group ID may correspond to a CORESET pool index (eg, CORESETPoolIndex).
  • the following two methods can be considered as a transmission/reception method for improving reliability using transmission in multiple TRPs.
  • FIG. 7 illustrates a multiple TRP transmission scheme in a wireless communication system to which the present disclosure can be applied.
  • the layer group may mean a predetermined layer set consisting of one or more layers.
  • the amount of transmission resources increases due to the number of layers, which has the advantage that robust channel coding with a low code rate can be used for TB.
  • channels are different from a plurality of TRPs, diversity ) can be expected to improve the reliability of the received signal based on the gain.
  • FIG. 7(b) an example of transmitting different CWs through layer groups corresponding to different TRPs is shown.
  • the TBs corresponding to CW #1 and CW #2 in the figure are the same. That is, CW #1 and CW #2 mean that the same TB is converted into different CWs through channel coding or the like by different TRPs, respectively. Therefore, it can be seen as an example of repeated transmission of the same TB.
  • the code rate corresponding to the TB is high.
  • the code rate may be adjusted by indicating different redundancy version (RV) values for encoded bits generated from the same TB, or the modulation order of each CW may be adjusted. has the advantage of being
  • RV redundancy version
  • the same TB is repeatedly transmitted through different layer groups, and as each layer group is transmitted by different TRP/panel, data reception of the terminal can increase the probability.
  • This is referred to as a Spatial Division Multiplexing (SDM)-based M-TRP URLLC transmission scheme.
  • Layers belonging to different layer groups are transmitted through DMRS ports belonging to different DMRS CDM groups, respectively.
  • multiple TRP-related contents have been described based on a spatial division multiplexing (SDM) scheme using different layers, but this is based on different frequency domain resources (eg, RB/PRB (set), etc.) based on FDM
  • SDM spatial division multiplexing
  • FDM F division multiplexing
  • TDM time division multiplexing
  • Multi-TRP scheduled by at least one DCI, may be performed as follows:
  • Scheme 1 (n is a natural number) TCI states in a single slot in overlapping time and frequency resource allocation
  • Each transmission occasion is one layer or a set of layers of the same TB, and each layer or layer set is associated with one TCI and one set of DMRS port(s).
  • a single codeword with one redundancy version (RV) is used for all layers or layer sets. From a UE perspective, different coded bits are mapped to different layers or layer sets with specific mapping rules.
  • Each transmission occasion is one layer or set of layers of the same TB, and each layer or layer set is associated with one TCI and one set of DMRS port(s).
  • a single codeword with one RV is used for each spatial layer or set of layers. RVs corresponding to each spatial layer or layer set may be the same or different.
  • Each transmission occasion is one layer of the same TB having one DMRS port associated with multiple TCI status indices, or the same with multiple DMRS ports associated with multiple TCI indices in turn (one by one) It is one layer of TB.
  • n is a natural number
  • TCI states in a single slot in non-overlapping frequency resource allocation Each non-overlapping frequency resource allocation is associated with one TCI state.
  • the same single/multiple DMRS port(s) is associated with all non-overlapping frequency resource allocations.
  • a single codeword with one RV is used for each non-overlapping frequency resource allocation.
  • RVs corresponding to each non-overlapping frequency resource allocation may be the same or different.
  • TDM Technique 3
  • n (n is a natural number) TCI states in a single slot in non-overlapping time resource allocation.
  • Each transmission occasion of TB has one TCI and one RV with time granularity of a mini-slot. All transmission occasion(s) in the slot use a common MCS with the same single or multiple DMRS port(s). RV/TCI status may be the same or different among transmission occasions.
  • TDM Technique 4
  • M-TRP multi-TRP
  • the MTRP-URLLC may mean that the M-TRP transmits the same transport block (TB) using different layers/time/frequency. It can be assumed that the UE configured with the MTRP-URLLC transmission method is instructed with multiple TCI state(s) by DCI, and data received using the QCL RS of each TCI state is the same TB. On the other hand, MTRP-eMBB may mean that M-TRP transmits different TBs using different layers/time/frequency. It can be assumed that the UE configured with the MTRP-eMBB transmission method is instructed with several TCI state(s) by DCI, and data received using the QCL RS of each TCI state are different TBs.
  • the UE may be determined/determined whether the corresponding M-TRP transmission is the URLLC transmission or the eMBB transmission. That is, when CRC masking of the DCI received by the UE is performed using the RNTI set for the MTRP-URLLC purpose, this corresponds to URLLC transmission, and the CRC masking of the DCI is performed using the RNTI set for the MTRP-eMBB purpose. If it is, this may correspond to eMBB transmission.
  • TRP may mean an antenna array having one or more antenna elements available in a network located in a specific geographic location of a specific area.
  • TRP is a base station, a transmission point (TP), a cell (eg, a macro cell) / micro cell (small cell) ) / pico cell (pico cell), etc.), antenna array (antenna array) or panel (panel), remote radio unit (RRU: remote radio unit) / remote radio head (RRH: remote radio head), etc.
  • the base station may mean a generic term for an object that transmits and receives data with the terminal.
  • the base station may be a concept including one or more TPs (Transmission Points), one or more TRPs (Transmission and Reception Points), and the like.
  • the TP and/or TRP may include a panel of a base station, a transmission and reception unit, and the like.
  • the present disclosure applies the proposed method by assuming cooperative transmission/reception between 2 TRPs for convenience of explanation, but it can be extended and applied even in a multi-TRP environment of 3 or more, and also in a multi-panel environment.
  • Different TRPs can be recognized as different TCI states to the UE, and the UE receives/transmits data/DCI/UCI using TCI state 1 indicates that data/DCI/UCI is received/transmitted from/to TRP 1. it means.
  • the meaning that the UE repeatedly transmits the same PUSCH to be received by a plurality of base stations may mean that the same data is transmitted through a plurality of PUSCHs, and each PUSCH is a UL channel of a different TRP can be optimized and transmitted.
  • the UE repeatedly transmits the same data through PUSCH 1 and 2, and PUSCH 1 transmits using UL TCI state 1 (or spatial relation info 1) for TRP 1, and precoder / Link adaptation, such as a modulation coding scheme (MCS), is also scheduled and transmitted with a value optimized for the channel of TRP 1.
  • MCS modulation coding scheme
  • PUSCH 2 is transmitted using UL TCI state 2 (or spatial relation info 1) for TRP 2, and link adaptation such as precoder/MCS also schedules a value optimized for the channel of TRP 2 receive and send
  • the repeatedly transmitted PUSCHs 1 and 2 may be transmitted at different times to be TDM, FDM, or SDM.
  • the meaning that the UE divides and transmits the same PUSCH so that a plurality of base stations (ie, MTRP) can receive it means that one data is transmitted through one PUSCH, but the resources allocated to the PUSCH are split to split the UL of different TRPs. It can be transmitted by optimizing for the channel.
  • the UE when the UE transmits the same data through a 10-symbol PUSCH, the first 5 symbols are transmitted using UL TCI state 1 (or spatial relation info 1) for TRP 1, and link such as precoder/MCS adaptation also receives and transmits a value optimized for the channel of TRP 1, and the remaining 5 symbols are transmitted using UL TCI state 2 (or spatial relation info 2) for TRP 2, and link such as precoder/MCS adaptation is also scheduled and transmitted with a value optimized for the TRP 2 channel.
  • one PUSCH is divided into time resources to perform TDM transmission for TRP 1 and TRP 2, but it may be transmitted using FDM/SDM methods.
  • the PUCCH may also be transmitted by the UE repeatedly transmitting the same PUCCH or dividing the same PUCCH so that a plurality of base stations (ie, MTRP) may receive it.
  • a plurality of base stations ie, MTRP
  • the proposal of the present invention can be extended and applied to various channels such as PUSCH/PUCCH/PDSCH/PDCCH.
  • the proposal of the present invention can be extended and applied to both the case where the channel is repeatedly transmitted on different time/frequency/spatial resources and the case where the channel is transmitted separately.
  • the UE transmits the PUSCH with a specific TRP it may mean that the UE transmits the PUSCH according to a configured specific UL TCI state.
  • that the UE transmits the PUSCH with a specific TRP may mean that the PUSCH is transmitted according to configured specific spatial relation information.
  • the UE transmitting the PUSCH with a specific TRP may mean transmitting the PUSCH based on the configured related CSI-RS.
  • the UE transmits the PUSCH with a specific TRP it may mean that the PUSCH is transmitted according to UL TCI state 0 or spatial relation information 0 or based on related CSI-RS 0.
  • that the UE transmits the PUSCH with a specific TRP 1 may mean that the PUSCH is transmitted according to UL TCI state 1 or according to spatial relation information 1 or based on related CSI-RS 1.
  • the existing NR UE uses a non-codebook based scheme or a codebook based scheme to determine a precoder for an uplink (UL) PUSCH.
  • N 1-port SRS resources may be configured in one SRS resource set (eg, N ⁇ 5).
  • the UE is instructed by one or more L max or less SRS resources in the SRS resource set through the SRS resource indicator (SRI) field of DCI.
  • SRI SRS resource indicator
  • Equation 3 C(N,i) denotes the number of cases in which i pieces are selected from among N pieces in any order.
  • the number of SRS resources selected (indicated) in this way is the same as the PUSCH rank.
  • the UE uses a precoder (/beam) applied to the selected (indicated) SRS resource as a PUSCH transmission (tx) precoder (/beam).
  • the PUSCH may be scheduled by DCI format 0_0, DCI format 0_1, DCI format 0_2, or may be semi-statically configured.
  • the UE determines a PUSCH transmission precoder based on an SRS resource indicator (SRI), a transmission precoding matrix indicator (TPMI), and a transmission rank.
  • SRI SRS resource indicator
  • TPMI transmission precoding matrix indicator
  • transmission rank is given by the SRS resource indicator field and the precoding information and number of layers field in DCI, respectively.
  • SRI, TPMI, and transmission rank are given by a higher layer parameter (srs-ResourceIndicator) for indicating SRS resource and a higher layer parameter (precodingAndNumberOfLayers) for indicating the number of precoding and layers.
  • SRS resource set (s) applicable to PUSCH is defined by a higher layer parameter (ie, srs-ResourceSetToAddModList or srs-ResourceSetToAddModListDCI-0-2) related to the SRS resource set in the SRS configuration (ie, SRS-config).
  • the TPMI is used to indicate the precoder to be applied in the layers ⁇ 0,..., v-1 ⁇ , and corresponds to the SRS resource selected by the SRI when a plurality of SRS resources are configured.
  • the TPMI is used to indicate a precoder to be applied in layers ⁇ 0,...., v-1 ⁇ , and corresponds to the SRS resource.
  • a transmission precoder is selected from an uplink codebook having the same number of antenna ports as a higher layer parameter (nrofSRS-Ports) for the number of SRS antenna ports in the SRS configuration (ie, SRS-Config).
  • the terminal When the terminal is set as a higher layer parameter (ie, txConfig) for transmission configuration set as 'codebook', the terminal is configured with at least one SRS resource.
  • the SRI indicated in slot n is associated with the most recent transmission of the SRS resource identified by the SRI, where the SRS resource is transmitted prior to the PDCCH carrying the SRI.
  • a rank/precoding matrix indicator is indicated through a transmission precoding matrix indicator (TPMI) field of DCI.
  • TPMI transmission precoding matrix indicator
  • one of 2 (or 4) SRS resources defined in one SRS resource set is indicated through the 1 (or 2) bit SRI field of DCI.
  • the UE performs UL PUSCH transmission by applying the PMI indicated through the TPMI field to the ports of the SRS resource selected (indicated) in this way.
  • a specific UL beam eg, an analog beam
  • a final precoder is generated by applying PMI to the ports to which the specific UL beam is applied.
  • SRS resource indicator SRI
  • SRI SRS resource indicator
  • N SRS is set by the upper layer parameter srs-ResourceSetToAddModList related to the SRS resource set and SRS resource set associated with the upper layer parameter usage related to the SRS usage of 'codeBook' or 'nonCodeBook' value It is the number of my configured SRS resources.
  • N SRS is set by the upper layer parameter srs-ResourceSetToAddModList related to the SRS resource set and is the number of SRS resources set in the SRS resource set associated with the upper layer parameter of 'nonCodeBook' value.
  • L max is given in the corresponding parameter. Otherwise, L max is given as the maximum number of layers of PUSCH supported by the UE for the serving cell for non-codebook based operation.
  • N SRS is the number of SRS resources set by the upper layer parameter srs-ResourceSetToAddModList related to the SRS resource set and set in the SRS resource set associated with the upper layer parameter of the 'codeBook' value.
  • the transform precoder is enabled or disabled depending on whether and for the maximum rank 4, 5 or 6 bits according to a predetermined table for 4 antenna ports, according to the upper layer parameter (maxRank) and the upper layer parameter for the codebook subset (codebookSubset);
  • ULFPTxModes is Mode1
  • the upper layer parameter (maxRank) for the maximum rank is 2
  • the transform precoder is disabled (disabled)
  • the upper layer for the codebook subset According to the layer parameter (codebookSubset)
  • 4 or 5 bits according to a predetermined table for 4 antenna ports;
  • ULFPTxModes is Mode1
  • the upper layer parameter (maxRank) for the maximum rank is 3 or 4
  • the transform precoder is disabled (disabled), in the codebook subset For 4 antenna ports, according to the upper layer parameter (codebookSubset), 4 or 6 bits according to a predetermined table;
  • the transform precoder is enabled or disabled depending on whether and for the maximum rank 2, 4 or 5 bits according to a predetermined table for 4 antenna ports, according to the upper layer parameter (maxRank) and the upper layer parameter for the codebook subset (codebookSubset);
  • ULFPTxModes is Mode1
  • the upper layer parameter (maxRank) for the maximum rank is 1, whether the transform precoder is enabled (enabled) or disabled (disabled) according to and according to the upper layer parameter for the codebook subset (codebookSubset), is 3 or 4 bits according to a predetermined table for 4 antenna ports;
  • the transform precoder is enabled or disabled depending on whether and for the maximum rank 2 or 4 bits according to a predetermined table for two antenna ports, depending on the upper layer parameter (maxRank) and the upper layer parameter for the codebook subset (codebookSubset);
  • the upper layer parameter transmission setting (txConfig) is 'codebook', ULFPTxModes is Mode1, the transform precoder is disabled (disabled), the upper layer parameter for the maximum rank (maxRank) is 2, and the upper layer for the codebook subset If the parameter (codebookSubset) is non-coherent, it is 2 bits according to a predetermined table for two antenna ports;
  • the transform precoder is enabled or disabled depending on whether and for the maximum rank 1 or 3 bits according to a predetermined table for two antenna ports, according to a higher layer parameter (maxRank) and a higher layer parameter for a codebook subset (codebookSubset);
  • ULFPTxModes is Mode1
  • the upper layer parameter (maxRank) for the maximum rank is 1, whether the transform precoder is enabled (enabled) or disabled (disabled) according to and according to the upper layer parameter (codebookSubset) for the codebook subset, is 2 bits according to the predetermined table for the two antenna ports;
  • the bit size of this field is the maximum port of the SRS resource among the configured SRS resources. determined by the number.
  • MSB most significant bits
  • the set of antenna ports ⁇ p 0 ,..., p ⁇ -1 ⁇ is determined according to 3GPP TS 38.214.
  • the precoding matrix W is equal to the identity matrix.
  • the TPMI index is given by a predetermined table.
  • the precoding matrix W 1.
  • Table 6 illustrates the precoding matrix W for single-layer transmission using two antenna ports.
  • the precoding matrix W is arranged from left to right in ascending order of the TPMI index.
  • Table 7 illustrates a precoding matrix (W ) for single-layer transmission using four antenna ports when transform precoding is enabled.
  • the precoding matrix W is arranged from left to right in ascending order of the TPMI index.
  • Table 8 illustrates a precoding matrix (W ) for single-layer transmission using four antenna ports when transform precoding is disabled.
  • the precoding matrix W is arranged from left to right in ascending order of the TPMI index.
  • Table 9 illustrates a precoding matrix (W ) for two-layer transmission using two antenna ports when transform precoding is disabled.
  • the precoding matrix W is arranged from left to right in ascending order of the TPMI index.
  • Table 10 illustrates a precoding matrix (W ) for two-layer transmission using four antenna ports when transform precoding is disabled.
  • the precoding matrix W is sorted from left to right in ascending order of the TPMI index.
  • Table 11 illustrates a precoding matrix (W ) for three-layer transmission using four antenna ports when transform precoding is disabled.
  • the precoding matrix W is arranged from left to right in ascending order of the TPMI index.
  • Table 12 illustrates a precoding matrix (W ) for four-layer transmission using four antenna ports when transform precoding is disabled.
  • the precoding matrix W is arranged from left to right in ascending order of the TPMI index.
  • TDM time division multiplexing
  • FDM frequency division multiplexing
  • SDM spatial division multiplexing
  • transmission and reception may be performed in the multiplexing method of SDM/FDM/TDM, respectively. have.
  • repeated transmission of the same TB may be performed using two or more of SDM/FDM/TDM resource regions.
  • a promise between the base station and the UE is set on how a plurality of TCI states indicated through the TCI field of a single DCI are mapped to different layers/different frequencies/different time resources. may need
  • the PUSCH may be transmitted in a plurality of TRPs at a plurality of transmission occasions (TO), where the plurality of TOs may be grouped by the number of TRPs.
  • TO transmission occasions
  • PUSCH when PUSCH is transmitted in two TRPs on four TOs, PUSCH is transmitted in TRP 1 in TO 1, PUSCH is transmitted in TRP 2 in TO 2, and PUSCH is transmitted in TRP 1 in TO 3 , in TO 4, the PUSCH may be transmitted as TRP 2.
  • the PUSCH may be transmitted based on a precoding vector group associated with each TO group (ie, TRP) in which the PUSCH is transmitted.
  • the precoding vector group may be determined as one or more precoding vectors constituting the precoding matrix indicated by the TPMI field in DCI.
  • a method in which a precoding vector for each TRP is determined will be described in detail.
  • each row of the precoding matrix corresponds to an antenna port. That is, each row vector of the precoding matrix (ie, a vector consisting of a single row) corresponds to a precoding vector corresponding to a specific antenna port.
  • each column of the precoding matrix corresponds to a layer. That is, each column vector of the precoding matrix (ie, a vector consisting of a single column) corresponds to a precoding vector corresponding to a specific layer.
  • Embodiment 1-1 A method in which the indicated rank is divided and set/allocated to two TRPs
  • a method in which two TRPs (ie, PUSCHs configured with different TCI states or different spatial relationship information) share a rank indicated by a single TPMI field (ie, dividedly indicated) is proposed. .
  • TPMI field of DCI may be set in the same manner as in the existing method, and PMI and rank may be indicated by a single TPMI field.
  • the precoding vector (ie, column vector) constituting the precoding matrix indicated in this way is divided into two groups (eg, precoding vector group 0 or precoding vector group 1) according to a predetermined rule. can be divided into Here, each group 0 and 1 may be applied to a PUSCH transmission occasion (TO: transmission occasion) of TRP 0 (ie, TCI state 0) and TRP 1 (ie, TCI state 1), respectively.
  • TO transmission occasion
  • any one precoding vector group may be determined as one or more precoding vectors among precoding vectors for each layer constituting the precoding matrix indicated by the TPMI field in DCI.
  • the first precoding vector group is applied to the PUSCH transmitted in the first TRP (ie, the PUSCH transmitted in the first TO group), where the first precoding vector A group may be determined as one or more precoding vectors for some layers in the precoding matrix.
  • the second precoding vector group is applied to the PUSCH transmitted in the second TRP (ie, the PUSCH transmitted in the second TO group), where the second precoding vector group is one for some layers in the precoding matrix. It may be determined by the above precoding vectors.
  • precoding vectors from the first vector (ie, the first column vector) to the ceil(rank/2)-th vector (ie, column vector) among rank precoding vectors constituting the precoding matrix. up to and may be grouped into group 0, and the remaining vectors (ie, column vectors) may be grouped into group 1. Also, vice versa.
  • the first column vector (ie, the leftmost vector) and the second column vector are grouped 0 may be grouped, and the third column vector and the fourth column vector may be grouped into group 1.
  • each column vector constituting the precoding matrix is a non-zero element in the column vector according to the number of row elements ( Or, according to the row index of a non-zero element, or according to which antenna port the non-zero element is a row element for which antenna port), each column vector is grouped can be
  • a 4x4 precoding matrix may consist of 4 column vectors (ie, 4x1 first column vector, 4x1 second column vector, 4x1 third column vector, 4x1 fourth column vector).
  • the corresponding column vector(s) may be grouped into group 1 of the precoding vector.
  • the corresponding column vector(s) may be grouped into group 1 of the precoding vector.
  • each precoding vector (ie, each column vector constituting each precoding matrix) is i)
  • the first and third row elements ie, elements applied to PUSCH antenna ports 1000 and 1002 have a non-zero value and the remaining row elements is set to 0 or ii)
  • the second and fourth row elements ie, elements applied to PUSCH antenna ports 1001 and 1003 have a non-zero value and the remaining row elements (row) element) may be set to 0. Or, vice versa.
  • the precoding vector having non-zero values in the first and third elements promises to be group 0 (ie, grouped), and the second and a precoding vector having a non-zero value in the fourth element (ie, the second and fourth row elements) may be grouped 1 (ie, may be grouped).
  • the antenna ports may be coherent or non-coherent.
  • the UE can control the relative phases of signals transmitted by coherent antenna ports, but cannot control the relative phases of signals transmitted by non-coherent antenna ports.
  • Partial coherent refers to a set of antenna ports including coherent antenna ports and non-coherent antenna ports.
  • TPMI indexes 0 to 5 indicate an entry (ie, a precoding matrix) for non-coherent transmission
  • TPMI indexes 6 to 13 are partial Indicates an entry (ie, a precoding matrix) for coherent (partial coherent) transmission
  • TPMI indexes 14 to 21 are entries (entry) for full coherent transmission (ie, precoding matrix) ) is indicated.
  • the first vector eg, the first column
  • a second vector eg, a second column vector
  • the above-described method may be applied to a non-coherent codebook.
  • a non-coherent codebook one element having a non-zero value among precoding vectors is one, and this non-zero element forms a vector.
  • Precoding vectors may be grouped according to the number of row elements constituting them (that is, according to the index of a row of an element other than 0). For example, a precoding vector in which an element having a non-zero value is the first or third row element belongs to group 0, and a precoding vector that is the second or fourth element may belong to group 1. have.
  • the first vector (eg, the first column) vector) may correspond to group 1
  • a second vector (eg, a second column vector) may correspond to group 0.
  • a precoding vector whose element having a non-zero value is the first or second row element belongs to group 0 and the precoding vector that is the third or fourth element belongs to group 1 can belong
  • the first vector eg, the first column
  • a second vector eg, a second column vector
  • the UE transmits a PUSCH toward TRP 0 at a PUSCH transmission time of TRP 0 (TO: transmission occasion) (ie, PUSCH transmission TO using UL TCI state 0 or PUSCH transmission TO using spatial relation info 0).
  • a PUSCH may be transmitted by applying a precoding vector of group 0 to a 4-port SRS (eg, SRS resource 0) used for transmission.
  • SRS eg, SRS resource 0
  • 4 port SRS used for PUSCH transmission toward TRP 1 for example, the PUSCH may be transmitted by applying the precoding vector of group 1 to the SRS resource 1).
  • the above-described partial coherent codebook when the above-described partial coherent codebook is applied, 0 is applied to 2 ports of the 4-port SRS in the process of applying the precoding vector, so that the corresponding port is muted.
  • the first column vector may correspond to group 0, and two antenna ports corresponding to element 0 may be muted.
  • the second column vector may correspond to group 1, and the two antenna ports corresponding to element 0 may be muted.
  • this proposal proposes a method of setting the SRS resource to only 2 ports despite using the 4 Tx codebook.
  • both SRS resources 0 and 1 may be set to 2 ports instead of 4 ports.
  • the UE transmits the PUSCH by applying the non-zero element (ie, the first element and the third element) values of the precoding vector of group 0 to port 0 and port 1 of SRS resource 0, respectively. have.
  • the PUSCH is transmitted by applying the values of the non-zero element (ie, the second element and the fourth element) of the group 1 precoding vector to port 0 and port 1 of SRS resource 1, respectively.
  • the codebook subset setting of TRP 0 and TRP 1 in the above embodiment is different, for example, the codebook subset setting TRP 0 is full coherent, TRP 1 is partially coherent (partial) coherent), there can be an ambiguous problem of which one to follow.
  • the UE may assume a large subset (ie, full coherent in the above example) or a small subset (ie, partial coherent in the above example).
  • the codebook subset may be configured based on a PUSCH-related configuration (eg, PUSCH-Config), fully- and partial- and non-coherent (fullyAndPartialAndNonCoherent) / partial- and non-coherent (partialAndNonCoherent) )/ may be set to one of non-coherent.
  • the codebook subset may be set as a subset of PMIs addressed by TPMI.
  • the PMIs indicate PMIs supported by the UE having the maximum coherent capacity.
  • Embodiment 1-2 A method in which the indicated antenna ports are divided and configured/allocated to two TRPs
  • two TRPs that is, PUSCHs with different TCI states or different spatial relationship information set
  • share an antenna port indicated by a single TPMI field that is, divide and indicate method
  • PMI and rank may be indicated by the single TPMI field.
  • N groups (N is a natural number) can be generated by manipulating/resetting the precoding vectors constituting the indicated precoding matrix. For example, precoding vectors may be divided into group 0 and group 1) may be generated.
  • Groups 0 and 1 may be applied to PUSCH TO of TRP 0 and 1, respectively.
  • all elements of rows other than the elements of the row assigned/indicated to the group are set to zero (reset), and all vectors of the corresponding precoding matrix are set. can be set.
  • Group 0 may consist of all vectors of the corresponding precoding matrix after resetting (resetting) the elements of the i 01 , i 02 th row of the indicated precoding matrix to 0 (zero).
  • Group 1 may consist of all vectors of the corresponding precoding matrix after resetting the elements of the i 11 , i 12th row of the indicated precoding matrix to 0 (zero).
  • i 01 , i 02 , i 11 , and i 12 can be set to 1 (ie, first row), 2 (ie, second row), 3 (ie, third row), 4 (ie, fourth row), respectively.
  • the base station may indicate an arbitrary value to the UE.
  • group 0 may be composed of all vectors of the precoding matrix in which the elements of the first and second rows are reset to zero.
  • group 1 may consist of all vectors of the precoding matrix in which the elements of the third and fourth rows are reset to zero.
  • the UE may transmit data (ie, PUSCH) in every PUSCH TO in the indicated rank.
  • the UE transmits data (ie, PUSCH) to PUSCH TO of TRP 0 using antenna ports i 11 , i 12 , and antenna ports i 01 , i 02 to PUSCH TO of TRP 1 using data (ie, PUSCH) can be transmitted.
  • antenna ports i 01 , i 02 ⁇ PLRS or spatial relation RS or QCL RS ⁇ and ⁇ PLRS or spatial relation RS or QCL RS ⁇ of ports i 11 and i 12 may be set differently.
  • the precoding vector group sets (reset) elements of different rows to zero for each layer (that is, for each column vector), and the corresponding precoding matrix can be set to any vector of .
  • the first vector of the indicated precoding matrix when configuring group 0 for inter-layer orthogonalization, resets the elements of the i01 and i02-th rows to 0 (zero), The th vector may reset the elements of the i11 and i12 th rows to 0 (zero). And, when composing group 1, the first vector of the indicated precoding matrix resets the elements of the i11 and i12 rows to 0 (zero), and the second vector sets the elements of the i01 and i02 rows to 0 (zero). can be reset to
  • Embodiments 1-1 and 1-2 a method of dividing/resetting the precoding vector constituting the precoding matrix into two groups has been proposed, but divided into two or more groups through the same method It is also possible to reset /reset.
  • TRP 0,1 When transmitting MTRP PUSCH, if the precoders of TRP 0,1 are rank 2 PMI 1 and rank 2 PMI 2, respectively, and 4 PUSCH TOs that divide or repeatedly transmit the same data are set, the UE is a PUSCH TO (transmission occasion ) 1, 2, 3, and 4 may transmit PUSCH to TRPs 0, 1, 0, and 1, respectively.
  • the UE transmits a PUSCH according to UL TCI state 0 (or spatial relation information 0) in PUSCH TO 1, and transmits a PUSCH according to UL TCI state 1 (or spatial relation information 1) in PUSCH TO 2, and PUSCH TO
  • PUSCH may be transmitted according to UL TCI state 0 (or spatial relation information 0)
  • PUSCH may be transmitted according to UL TCI state 1 (or spatial relation information 1) in PUSCH TO 3
  • the UE transmits a rank 2 PUSCH by using PMI 1, PMI 2, PMI 1, and PMI 2 in PUSCH TO 1, 2, 3, and 4, respectively.
  • PMI 1, PMI 2, PMI 1, and PMI 2 since data reliability may be lowered due to inter-layer interference that occurs when transmitting rank 2 or higher, it may not be suitable for the MTRP PUSCH transmission method that increases reliability by repeatedly transmitting/splitting PUSCH to multiple TOs. .
  • Table 13 illustrates a precoder applied to each PUSCH transmission occasion (TO).
  • the rank I precoder is applied to each PUSCH TO to transmit I-layer
  • PUSCH TO 1, 2, 3, and 4 transmit PUSCH with TRP 0, 1, 0, and 1, respectively (i.e. , UL TCI states 0, 1, 0, 1 or spatial relation RS 0, 1, 0, 1 or associated CSIRS 0, 1, 0, 1 in PUSCH TO 1, 2, 3, 4 respectively beam), Table 14 below and the proposed method can be applied.
  • PUSCH TOs 1 and 3 may be grouped into one PUSCH TO group, and PUSCH TOs 2 and 4 may be grouped into another PUSCH TO group.
  • a precoding vector for a single layer may be applied to the PUSCH transmitted in each TO group for each TO.
  • a precoding vector for a single layer may be sequentially and circularly used within a corresponding precoding vector group.
  • the single-layer precoder constituting the rank l precoder may be sequentially and circularly applied from the first layer precoder during PUSCH transmission in each PUSCH TO.
  • the first layer precoder among the PMIs of the precoders corresponding to each TRP is sequentially applied to PUSCH TO sequentially (that is, in the order of TRP), and the second layer precoder among the PMIs of the precoders corresponding to each TRP can be applied in the following order.
  • PUSCH TO precoder PUSCH rank One PMI 1 first layer precoder One 2 PMI 2 first layer precoder One 3 PMI 1 second layer precoder One 4 PMI 2 second layer precoder One
  • PMI 1 may be interpreted as group 0 in Examples 1-1 and 1-2
  • PMI 2 may be interpreted as group 1.
  • the PMI value for each TRP may be indicated by one TPMI field, and the precoding matrix according to the indicated TPMI field value is divided into groups 0 and 1, and a single layer within each group. Precoders may be selected sequentially.
  • the codebook-based UL PUSCH transmission has been described as an example, but the PMI is not directly indicated, and the proposed method is extended to a non-codebook based method indicating a precoded SRS port.
  • the number of SRS ports of each TRP set through SRI in DCI is I (eg, two) or more, and I-layer transmission is performed using a precoder applied to I port SRS in each PUSCH TO.
  • a method of transmitting PUSCH in a single layer by sequentially applying the precoder applied to the first port of the I port SRS, the precoder applied to the second port, ..., the precoder applied to the I-th port one by one suggest
  • two 1-port SRS resources are indicated for PUSCH transmission of TRP 0 (that is, it is the same as that of 2-port SRS indicated according to a codebook-based transmission scheme) ), it is assumed that two 1-port SRS resources (eg, SRS resources 2 and 3) are indicated for PUSCH transmission of TRP 1.
  • two PUSCH TOs are set and PUSCH TO 1, 2, 3, and 4 transmit PUSCH to TRP 0, 1, 0, 1, respectively (that is, UL TCI in PUSCH TO 1, 2, 3, 4, respectively)
  • the state 0, 1, 0, 1 or the spatial relation RS 0, 1, 0, 1 or the associated CSIRS 0, 1, 0, 1 generates a UL beam)
  • the proposed method is applied as shown in Table 15 below.
  • the UE when transmitting a PUSCH, sequentially applies the precoder applied to the port of the first SRS resource among the SRS resources corresponding to each TRP to the PUSCH TO sequentially (ie, in the order of the TRP), and each SRS resource Among them, the precoder applied to the port of the second SRS resource may be applied in the following order.
  • PUSCH TO precoder PUSCH rank One Precoder applied to port of SRS resource 0 One 2 Precoder applied to port of SRS resource 2 One 3 Precoder applied to port of SRS resource 1 One 4 Precoder applied to port of SRS resource 3 One
  • the rank for each PUSCH TO is limited to 1 for convenience of explanation, but rank 2 transmission for each PUSCH TO is also possible by applying the proposed method.
  • the UE may assume/considerate the first layer precoder and the second layer precoder of the PMI as 'first rank 2 precoder'.
  • the UE may assume/consider the third layer precoder and the fourth layer precoder as 'second rank 2 precoder'.
  • the UE may sequentially apply the 'first rank 2 precoder' and the 'second rank 2 precoder' to each PUSCH TO.
  • the number of layers to be applied to each PUSCH TO may be defined by a specific rule (eg, for each PUSCH TO (TRI indication value) / 2 layer(s) each).
  • the base station may separately set/specify the value of the number of layers to be applied to each PUSCH TO to the terminal.
  • each PUSCH TO may be drawn from each PUSCH TO and additionally allocated to a non-zero power port.
  • each layer in each PUSCH TO is transmitted by equally splitting the power allocated to a port.
  • 1/4 power is distributed to each port. That is, 1/4 power may be distributed to each of ports 0 and 2 to PUSCH TO of TRP0, and 1/4 power may be distributed to each of ports 1 and 3 to PUSCH TO of TRP1.
  • FIG. 8 illustrates a signaling procedure between a network and a terminal according to an embodiment of the present disclosure.
  • Embodiment 1 is Multiple to which the methods (eg, Embodiment 1 / Embodiment 1-1 / Embodiment 1-2 / Embodiment 2 / Embodiment 3, etc.) proposed in the present disclosure can be applied.
  • TRP ie, M-TRP, or multiple (multiple) cells, hereinafter all TRPs may be replaced with cells
  • a network eg, TRP 1, TRP 2
  • a terminal ie, UE
  • the UE/Network is just an example and may be substituted for various devices as described in FIG. 11 to be described later. 8 is only for convenience of description, and does not limit the scope of the present disclosure. Also, some step(s) shown in FIG. 8 may be omitted depending on circumstances and/or settings.
  • a Network may be a single base station including a plurality of TRPs, and may be a single cell including a plurality of TRPs.
  • an ideal (ideal) / non-ideal (non-ideal) backhaul (backhaul) may be set between TRP 1 and TRP 2 constituting the network.
  • backhaul backhaul
  • the following description will be described based on a plurality of TRPs, which may be equally extended and applied to transmission through a plurality of panels.
  • the operation of the terminal receiving a signal from TRP1/TRP2 can be interpreted/explained as an operation of the terminal receiving a signal from the Network (via/using TRP1/2) (or it may be an operation)
  • the operation in which the terminal transmits a signal to TRP1/TRP2 can be interpreted/explained as an operation in which the terminal transmits a signal to the network (via/using TRP1/TRP2) (or may be an operation)
  • TRP is a panel, an antenna array, a cell (eg, macro cell (macro cell) / small cell (small cell) / pico cell (pico)) cell), etc.), TP (transmission point), base station (base station, gNB, etc.) may be replaced and applied.
  • the TRP may be classified according to information (eg, index, identifier (ID)) about the CORESET group (or CORESET pool).
  • ID identifier
  • the configuration of such a CORESET group may be performed through higher layer signaling (eg, RRC signaling, etc.).
  • the base station may mean a generic term for an object that transmits and receives data with the terminal.
  • the base station may be a concept including one or more TPs (Transmission Points), one or more TRPs (Transmission and Reception Points), and the like.
  • the TP and/or TRP may include a panel of a base station, a transmission and reception unit, and the like.
  • FIG. 8 shows M-TRP (or cell, hereinafter all TRPs can be replaced by cell/panel, or when a plurality of CORESETs (/CORESET group) are set from one TRP.
  • the terminal receives a single DCI in the case of (that is, when one TRP transmits DCI to the UE), signaling is exemplified.
  • TRP1 transmits DCI as a representative. 8 is only an example for convenience of description, and does not limit the technical scope of the present disclosure. Accordingly, it is of course also applicable when the UE receives multiple DCI (ie, when the network transmits DCI to the UE through/using each TRP).
  • the UE may transmit UE capability to the network through/using TRP1 (and/or TRP2).
  • the UE capability may include capability information of the UE related to the operation of the UE.
  • the network may perform settings supportable by the UE based on the UE capability. For example, as described in Embodiment 3 above, capability information on whether the UE can use the power of a muted port in an unmuted port may be transmitted through the UE capability.
  • the network may configure power suitable for the UE based on power-related capability information.
  • the UE may receive configuration information related to TRP-based transmission/reception through/using TRP 1 (and/or TRP 2) from the Network (S801).
  • the configuration information may include information related to network configuration (ie, TRP configuration)/resource allocation related to multiple (Multiple) TRP-based transmission and reception.
  • the configuration information may be transmitted through higher layer signaling (eg, RRC signaling, MAC control element (CE: control information), etc.).
  • the setting information is predefined or set, the corresponding step may be omitted.
  • the configuration information is a configuration related to the MTRP transmission described in the above-described proposed method (eg, embodiment 1 / embodiment 1-1 / embodiment 1-2 / embodiment 2 / embodiment 3, etc.) information may be included.
  • the configuration information includes configuration information for CORESET/ CORESET group (or pool) related to the Network (eg, TRP 1 / TRP 2) / TCI status related configuration information associated with each TRP (or Spatial relationship information associated with each TRP) and the like.
  • the configuration information includes the SRS resource related configuration (eg, embodiment 1/ embodiment 1-1/ embodiment 1-2/ embodiment 2/ embodiment 3, etc.)
  • SRS resource related usage eg, codebook based) / non-codebook based (non-codebook based)
  • antenna switching / beam management beam management, etc.
  • configuration for uplink channel transmission eg, configuration for PUSCH serving cell (PUSCH-servingcellconfig) / configuration for the maximum number of MIMO layers) (maxMIMO-layer, etc.) / codebook subset (codebooksubset) / maximum rank (maxrank), etc.
  • the configuration information includes multiple uplink TCI states for uplink (ie, PUSCH) transmission to multiple TRPs (ie, information about multiple reference signals having a QCL relationship with DMRS of PUSCH) or multiple spatial relationship information ( spatial relation info) (ie, information on multiple spatial relation reference signals).
  • PUSCH transmission to each TRP may correspond to each TCI state or each spatial relationship information.
  • the terminal is based on the first TCI state or first spatial relationship information, the first transmission time point (TO) (s) (that is, one or more of the plurality of transmission time points (TO) of the whole
  • the PUSCH is transmitted in the TO group including the TO), and the UE transmits the second transmission time point (TO)(s) among the plurality of transmission time points (TO) based on the second TCI state or the second spatial relationship information ( That is, the PUSCH may be transmitted in a TO group including one or more TOs.
  • the UE may receive DCI through/using TRP 1 from the Network (S802).
  • the DCI may be transmitted through a control channel (eg, PDCCH, etc.).
  • a control channel eg, PDCCH, etc.
  • TRP 1 receives a single DCI for transmitting DCI as a representative.
  • the DCI is (indicative) information (eg, TCI field) for the TCI state / resource allocation information (eg, bandwidth) for the TCI state / data channel (eg, PDSCH / PUSCH) ) for resource allocation information (ie, space/frequency/time resources), and the like.
  • the DCI is the SRI field / It may include a precoding information and number of layers field (or a TPMI field).
  • the UE may determine a PUSCH transmission precoder based on an SRS resource indicator (SRI), a transmission precoding matrix indicator (TPMI), and a transmission rank.
  • SRI SRS resource indicator
  • TPMI transmission precoding matrix indicator
  • transmission rank may be given by an SRS resource indicator field and a precoding information and number of layers field in DCI, respectively.
  • one of 2 (or 4) SRS resources defined in one SRS resource set is indicated through the 1 (or 2) bit SRI field of DCI.
  • the UE may transmit an SRS to the network.
  • the SRI indicated in slot n by the DCI is related to the most recent transmission of the SRS resource identified by the SRI (ie, the most recent before the PDCCH carrying the DCI).
  • the terminal is given by the DCI (ie, precoding information and number of layers) by the field
  • a PUSCH may be transmitted to the network by applying a specific precoding matrix indicated from a codebook predetermined according to a given) TPMI and a transmission rank.
  • the precoding vector indicated / set by the TPMI in DCI may be divided into a plurality of groups (eg, group 0 / group 1) based on a predefined rule, and each group is the PUSCH of each TRP It can be applied to TO.
  • the predefined rule may be determined based on a codebook subset setting (eg, partial coherent/non-coherent, etc.).
  • the predefined rule may be based on the method described in Embodiment 1/Embodiment 1-1/Embodiment 1-2 described above.
  • the UE may encode data 1 and data 2 (S803).
  • data 1 and data 2 S803
  • the UE is the data 1 / the data 2 can be encoded.
  • the UE may transmit data 1 to the network through/using TRP 1 (S804).
  • the UE may transmit data 2 to the network through/using TRP 2 (S805).
  • the data 1 and/or the data 2 may be transmitted through an uplink channel (eg, PUSCH).
  • data 1 and/or data 2 may be transmitted based on the setting information/DCI of steps S801 and/or S802 described above.
  • a coder or beam or the like may be applied to transmit the data 1 and/or the data 2 .
  • Data 1 and data 2 may be transmitted to different TRPs, respectively, and this may be collectively referred to as PUSCH transmission without TRP classification.
  • the PUSCH may be transmitted on a plurality of transmission time points (TOs).
  • the plurality of transmission time points may be divided into N TO groups corresponding to each TRP (that is, each TO group includes one or more TOs), and different uplink TCI states for PUSCH transmission for each TO group
  • spatial relation information may be used.
  • the PUSCH transmitted in each TO group is the PUSCH may be transmitted based on the precoding vector group associated with the TO group in which the is transmitted.
  • the precoding vector group may be determined as one or more precoding vectors (ie, column vectors and/or row vectors) constituting a precoding matrix determined according to TPMI and/or transmission rank.
  • the precoding vector group may be determined as one or more precoding vectors among precoding vectors for each layer constituting the precoding matrix. For example, in the case of PUSCH transmission of rank 4 in 2 TRP, PUSCH transmitted in the first TO group (transmission in the first TRP or transmission according to the first UL TCI state or transmission according to the first spatial relationship information)
  • the precoding vector group applied to may include a first column vector (ie, a column vector for the first layer) and a second column vector (ie, a column vector for the second layer).
  • the precoding vector group applied to the PUSCH (transmission to the second TRP or transmission according to the second UL TCI state or transmission according to the second spatial relationship information) transmitted in the second TO group is the third column vector (that is, It may consist of a column vector for the third layer) and a fourth column vector (ie, a column vector for the fourth layer).
  • the first precoding vector group applied to the PUSCH (transmission to the first TRP or transmission according to the first UL TCI state or transmission according to the first spatial relationship information) transmitted in the first TO group is the first From the precoding vector for the layer, ceil (transmission rank/2 indicated by DCI) may be determined as the precoding vector for the layer (ceil(x) is the smallest integer not less than x).
  • the second precoding vector group applied to the PUSCH (transmission according to the second TRP or transmission according to the second UL TCI state or transmission according to the second spatial relationship information) transmitted in the second TO group is a precoding vector group for the remaining layers. It may be determined as a coding vector.
  • the precoding vector group is determined as one or more precoding vectors in which an element for a predetermined antenna port has a non-zero value among precoding vectors for each layer constituting the precoding matrix.
  • precoding vector group may be composed of column vectors having non-zero values in the first and third row elements (ie, elements for the first and third antenna ports).
  • the precoding vector group applied to the PUSCH (transmission to the second TRP or transmission according to the second UL TCI state or transmission according to the second spatial relationship information) transmitted in the second TO group is the second and fourth row elements (ie, elements for the 2nd and 4th antenna ports) may be composed of a non-zero value as a column vector.
  • the precoding vector group may be determined as precoding vectors for all layers in the precoding matrix in which elements for some antenna ports in the precoding matrix are reset to 0.
  • the PUSCH transmitted in the first TO group transmission according to the first TRP or transmission according to the first UL TCI state or transmission according to the first spatial relationship information
  • the first precoding vector group includes all column vectors ( That is, it may be composed of precoding vectors for all layers).
  • the second precoding vector group applied to the PUSCH (transmission according to the second TRP or transmission according to the second UL TCI state or transmission according to the second spatial relationship information) transmitted in the second TO group is indicated by DCI
  • All column vectors (ie, precoding vectors for all layers) in the precoding matrix in which the 3rd and 4th row elements in the precoding matrix (ie, the elements for the 3rd and 4th antenna ports) are reset to zero can be composed of
  • the precoding vector group includes the precoding vector for the first layer in which elements for some antenna ports in the precoding matrix are reset to 0 and the remaining antenna ports.
  • An element may be determined as a precoding vector for the second layer reset to 0. That is, elements reset to 0 for each layer may not overlap or overlap.
  • the precoding vector group applied to the PUSCH transmission according to the second TRP or transmission according to the second UL TCI state or transmission according to the second spatial relationship information
  • transmitted to a specific TO group is in the first and second rows 1st column vector (i.e. precoding vector for 1st layer) with elements (i.e.
  • row elements for 1st and 2nd antenna ports reset to zero and 3rd and 4th row elements (i.e. 3rd row elements) and a second column vector (ie, a precoding vector for the second layer) in which the row element for the fourth antenna port) is reset to zero.
  • the PUSCH may be transmitted based on a precoding vector for a single layer in a precoding vector group associated with a TO group in which the PUSCH is transmitted.
  • the precoding vector for the single layer for each TO in which the PUSCH is transmitted in the TO group may be sequentially and circularly applied in the precoding vector group.
  • two or more rank I precoders may be divided into precoders for each layer and sequentially applied to PUSCH TO to transmit PUSCH in a single layer.
  • One precoding vector group may be composed of first and second column vectors (ie, precoding vectors for the first and second layers) in the precoding matrix indicated by DCI.
  • the first and second column vectors may be alternately applied to the PUSCH transmitted in the first TO group for each TO.
  • the second precoding vector group applied to the PUSCH (transmission according to the second TRP or transmission according to the second UL TCI state or transmission according to the second spatial relationship information) transmitted in the second TO group is indicated by DCI It may be composed of 3rd and 4th column vectors (ie, precoding vectors for the 3rd and 4th layers) in the precoding matrix.
  • the third and fourth column vectors may be alternately applied to the PUSCH transmitted in the second TO group for each TO.
  • power for all antenna ports of the precoding matrix may be equally distributed to antenna ports corresponding to non-zero elements in the precoding vector group.
  • the UE may transmit the data 1 and/or the data 2 by distributing power for each port/rank based on the method of Embodiment 3 described above.
  • FIG 9 illustrates an operation of a terminal for PUSCH transmission and reception according to an embodiment of the present disclosure.
  • FIG. 9 exemplifies the operation of the terminal based on the previously proposed methods (eg, Embodiment 1/Example 1-1/Example 1-2/Example 2/Example 3, etc.).
  • the example of FIG. 9 is for convenience of description, and does not limit the scope of the present disclosure. Some step(s) illustrated in FIG. 9 may be omitted depending on circumstances and/or settings.
  • the terminal in FIG. 9 is only one example, and may be implemented as the device illustrated in FIG. 11 below.
  • the processor 102/202 of FIG. 9 may control to transmit/receive a channel/signal/data/information using the transceiver 106/206, and transmit or receive a channel/signal/ Data/information may be controlled to be stored in the memory 104/204.
  • FIG. 9 may be processed by one or more processors 102 and 202 of FIG. 11 .
  • the operation of FIG. 9 is a memory in the form of an instruction/program (eg, instruction, executable code) for driving at least one processor (eg, 102 and 202 ) of FIG. 11 . (eg, one or more memories 104 , 204 of FIG. 11 ).
  • instruction/program eg, instruction, executable code
  • the operation of the terminal for one base station ie, one TRP
  • the operation of the terminal may be extended and applied to the operation between a plurality of TRPs.
  • the terminal may transmit the capability of the terminal to the base station.
  • the capability may include capability information of the terminal related to the operation of the terminal.
  • the base station may perform settings supportable by the terminal based on the capability. For example, as described in Embodiment 3 above, capability information on whether the terminal can use the power of a muted port in a non-muted port may be transmitted through the capability.
  • the base station may set power suitable for the terminal based on power-related capability information.
  • the terminal may receive configuration information related to multiple TRP-based transmission and reception from the base station (S901).
  • the configuration information may include information related to network configuration (ie, TRP configuration)/resource allocation related to multiple (Multiple) TRP-based transmission and reception.
  • the configuration information may be transmitted through higher layer signaling (eg, RRC signaling, MAC control element (CE: control information), etc.).
  • RRC signaling e.g., RRC signaling, MAC control element (CE: control information), etc.
  • CE MAC control element
  • the configuration information is a configuration related to the MTRP transmission described in the above-described proposed method (eg, embodiment 1 / embodiment 1-1 / embodiment 1-2 / embodiment 2 / embodiment 3, etc.) information may be included.
  • the configuration information includes configuration information for CORESET / CORESET group (or pool) related to the base station / TCI state related configuration information associated with each TRP (or spatial relationship information associated with each TRP), etc. can do.
  • the configuration information includes the SRS resource related configuration (eg, embodiment 1/ embodiment 1-1/ embodiment 1-2/ embodiment 2/ embodiment 3, etc.)
  • SRS resource related usage eg, codebook based) / non-codebook based (non-codebook based)
  • antenna switching / beam management beam management, etc.
  • configuration for uplink channel transmission eg, configuration for PUSCH serving cell (PUSCH-servingcellconfig) / configuration for the maximum number of MIMO layers) (maxMIMO-layer, etc.) / codebook subset (codebooksubset) / maximum rank (maxrank), etc.
  • the configuration information includes multiple uplink TCI states for uplink (ie, PUSCH) transmission to multiple TRPs (ie, information about multiple reference signals having a QCL relationship with DMRS of PUSCH) or multiple spatial relationship information ( spatial relation info) (ie, information on multiple spatial relation reference signals).
  • PUSCH transmission to each TRP may correspond to each TCI state or each spatial relationship information.
  • the terminal is based on the first TCI state or first spatial relationship information, the first transmission time point (TO) (s) (that is, one or more of the plurality of transmission time points (TO) of the whole
  • the PUSCH is transmitted in the TO group including the TO), and the UE transmits the second transmission time point (TO)(s) among the plurality of transmission time points (TO) based on the second TCI state or the second spatial relationship information ( That is, the PUSCH may be transmitted in a TO group including one or more TOs.
  • the terminal receives DCI for PUSCH scheduling from the base station (S902).
  • the DCI may be transmitted through a control channel (eg, PDCCH, etc.).
  • the DCI is (indicated) information (eg, TCI field) for the TCI state / resource allocation information (eg, bandwidth) for the TCI state / data channel (eg, PDSCH / PUSCH) It may include resource allocation information (ie, space/frequency/time resources) and the like.
  • the DCI is the SRI field / It may include a precoding information and number of layers field (or a TPMI field).
  • the UE may determine a PUSCH transmission precoder based on an SRS resource indicator (SRI), a transmission precoding matrix indicator (TPMI), and a transmission rank.
  • SRI SRS resource indicator
  • TPMI transmission precoding matrix indicator
  • transmission rank may be given by an SRS resource indicator field and a precoding information and number of layers field in DCI, respectively.
  • one of 2 (or 4) SRS resources defined in one SRS resource set is indicated through the 1 (or 2) bit SRI field of DCI.
  • the UE may transmit an SRS to the network.
  • the SRI indicated in slot n by the DCI is related to the most recent transmission of the SRS resource identified by the SRI (ie, the most recent before the PDCCH carrying the DCI).
  • the terminal is given by the DCI (ie, precoding information and number of layers) by the field
  • a PUSCH may be transmitted to the network by applying a specific precoding matrix indicated from a codebook predetermined according to a given) TPMI and a transmission rank.
  • the precoding vector indicated / set by the TPMI in DCI may be divided into a plurality of groups (eg, group 0 / group 1) based on a predefined rule, and each group is the PUSCH of each TRP It can be applied to TO.
  • the predefined rule may be determined based on a codebook subset setting (eg, partial coherent/non-coherent, etc.).
  • the predefined rule may be based on the method described in Embodiment 1/Embodiment 1-1/Embodiment 1-2 described above.
  • the UE transmits the PUSCH to the base station based on DCI (S903).
  • the rank/precoder (or beam) may be applied to transmit the PUSCH.
  • the PUSCH may be transmitted on a plurality of transmission time points (TOs).
  • the plurality of transmission time points may be divided into N TO groups corresponding to each TRP (that is, each TO group includes one or more TOs), and different uplink TCI states for PUSCH transmission for each TO group
  • spatial relation information may be used.
  • the PUSCH transmitted in each TO group is the PUSCH may be transmitted based on the precoding vector group associated with the TO group in which the is transmitted.
  • the precoding vector group may be determined as one or more precoding vectors (ie, column vectors and/or row vectors) constituting a precoding matrix determined according to TPMI and/or transmission rank.
  • the precoding vector group may be determined as one or more precoding vectors among precoding vectors for each layer constituting the precoding matrix. For example, in the case of PUSCH transmission of rank 4 in 2 TRP, PUSCH transmitted in the first TO group (transmission in the first TRP or transmission according to the first UL TCI state or transmission according to the first spatial relationship information)
  • the precoding vector group applied to may include a first column vector (ie, a column vector for the first layer) and a second column vector (ie, a column vector for the second layer).
  • the precoding vector group applied to the PUSCH (transmission to the second TRP or transmission according to the second UL TCI state or transmission according to the second spatial relationship information) transmitted in the second TO group is the third column vector (that is, It may consist of a column vector for the third layer) and a fourth column vector (ie, a column vector for the fourth layer).
  • the first precoding vector group applied to the PUSCH (transmission to the first TRP or transmission according to the first UL TCI state or transmission according to the first spatial relationship information) transmitted in the first TO group is the first From the precoding vector for the layer, ceil (transmission rank/2 indicated by DCI) may be determined as the precoding vector for the layer (ceil(x) is the smallest integer not less than x).
  • the second precoding vector group applied to the PUSCH (transmission according to the second TRP or transmission according to the second UL TCI state or transmission according to the second spatial relationship information) transmitted in the second TO group is a precoding vector group for the remaining layers. It may be determined as a coding vector.
  • the precoding vector group is determined as one or more precoding vectors in which an element for a predetermined antenna port has a non-zero value among precoding vectors for each layer constituting the precoding matrix.
  • precoding vector group may be composed of column vectors having non-zero values in the first and third row elements (ie, elements for the first and third antenna ports).
  • the precoding vector group applied to the PUSCH (transmission to the second TRP or transmission according to the second UL TCI state or transmission according to the second spatial relationship information) transmitted in the second TO group is the second and fourth row elements (ie, elements for the 2nd and 4th antenna ports) may be composed of a non-zero value as a column vector.
  • the precoding vector group may be determined as precoding vectors for all layers in the precoding matrix in which elements for some antenna ports in the precoding matrix are reset to 0.
  • the PUSCH transmitted in the first TO group transmission according to the first TRP or transmission according to the first UL TCI state or transmission according to the first spatial relationship information
  • the first precoding vector group includes all column vectors ( That is, it may be composed of precoding vectors for all layers).
  • the second precoding vector group applied to the PUSCH (transmission according to the second TRP or transmission according to the second UL TCI state or transmission according to the second spatial relationship information) transmitted in the second TO group is indicated by DCI
  • All column vectors (ie, precoding vectors for all layers) in the precoding matrix in which the 3rd and 4th row elements in the precoding matrix (ie, the elements for the 3rd and 4th antenna ports) are reset to zero can be composed of
  • the precoding vector group includes the precoding vector for the first layer in which elements for some antenna ports in the precoding matrix are reset to 0 and the remaining antenna ports.
  • An element may be determined as a precoding vector for the second layer reset to 0. That is, elements reset to 0 for each layer may not overlap or overlap.
  • the precoding vector group applied to the PUSCH transmission according to the second TRP or transmission according to the second UL TCI state or transmission according to the second spatial relationship information
  • transmitted to a specific TO group is in the first and second rows 1st column vector (i.e. precoding vector for 1st layer) with elements (i.e.
  • row elements for 1st and 2nd antenna ports reset to zero and 3rd and 4th row elements (i.e. 3rd row elements) and a second column vector (ie, a precoding vector for the second layer) in which the row element for the fourth antenna port) is reset to zero.
  • the PUSCH may be transmitted based on a precoding vector for a single layer in a precoding vector group associated with a TO group in which the PUSCH is transmitted.
  • the precoding vector for the single layer for each TO in which the PUSCH is transmitted in the TO group may be sequentially and circularly applied in the precoding vector group.
  • two or more rank I precoders may be divided into precoders for each layer and sequentially applied to PUSCH TO to transmit PUSCH in a single layer.
  • One precoding vector group may be composed of first and second column vectors (ie, precoding vectors for the first and second layers) in the precoding matrix indicated by DCI.
  • the first and second column vectors may be alternately applied to the PUSCH transmitted in the first TO group for each TO.
  • the second precoding vector group applied to the PUSCH (transmission to the second TRP or transmission according to the second UL TCI state or transmission according to the second spatial relationship information) transmitted in the second TO group is indicated by DCI It may be composed of 3rd and 4th column vectors (ie, precoding vectors for the 3rd and 4th layers) in the precoding matrix.
  • the third and fourth column vectors may be alternately applied to the PUSCH transmitted in the second TO group for each TO.
  • power for all antenna ports of the precoding matrix may be equally distributed to antenna ports corresponding to non-zero elements in the precoding vector group.
  • the UE may transmit the PUSCH by distributing power for each port/rank based on the method of Embodiment 3 described above.
  • FIG. 10 illustrates an operation of a terminal for PUSCH transmission and reception according to an embodiment of the present disclosure.
  • FIG. 10 illustrates an operation of a base station based on the previously proposed methods (eg, Embodiment 1/Example 1-1/Example 1-2/Embodiment 2/Example 3, etc.).
  • the example of FIG. 10 is for convenience of description, and does not limit the scope of the present disclosure. Some step(s) illustrated in FIG. 10 may be omitted depending on circumstances and/or settings.
  • the base station in FIG. 10 is only one example, and may be implemented as the apparatus illustrated in FIG. 11 below.
  • the processor 102/202 of FIG. 10 may control to transmit/receive a channel/signal/data/information using the transceiver 106/206, and transmit or receive a channel/signal/ Data/information may be controlled to be stored in the memory 104/204.
  • FIG. 10 may be processed by one or more processors 102 and 202 of FIG. 11 .
  • the operation of FIG. 10 is a memory in the form of an instruction/program (eg, instruction, executable code) for driving at least one processor (eg, 102 and 202 ) of FIG. 11 . (eg, one or more memories 104 , 204 of FIG. 11 ).
  • instruction/program eg, instruction, executable code
  • one base station ie, one TRP
  • the operation of the base station may be extended and applied to the operation of a plurality of TRPs.
  • the base station may receive the capability of the terminal from the terminal.
  • the capability may include capability information of the terminal related to the operation of the terminal.
  • the base station may perform settings supportable by the terminal based on the capability. For example, as described in Embodiment 3 above, capability information on whether the terminal can use the power of a muted port in a non-muted port may be transmitted through the capability.
  • the base station may set power suitable for the terminal based on power-related capability information.
  • the base station may transmit configuration information related to multiple TRP-based transmission and reception to the terminal (S1001).
  • the configuration information may include information related to network configuration (ie, TRP configuration)/resource allocation related to multiple (Multiple) TRP-based transmission and reception.
  • the configuration information may be transmitted through higher layer signaling (eg, RRC signaling, MAC control element (CE: control information), etc.).
  • RRC signaling e.g., RRC signaling, MAC control element (CE: control information), etc.
  • CE MAC control element
  • the configuration information is a configuration related to the MTRP transmission described in the above-described proposed method (eg, embodiment 1 / embodiment 1-1 / embodiment 1-2 / embodiment 2 / embodiment 3, etc.) information may be included.
  • the configuration information includes configuration information for CORESET / CORESET group (or pool) related to the base station / TCI state related configuration information associated with each TRP (or spatial relationship information associated with each TRP), etc. can do.
  • the configuration information includes the SRS resource related configuration (eg, embodiment 1/ embodiment 1-1/ embodiment 1-2/ embodiment 2/ embodiment 3, etc.)
  • SRS resource related usage eg, codebook based) / non-codebook based (non-codebook based)
  • antenna switching / beam management beam management, etc.
  • configuration for uplink channel transmission eg, configuration for PUSCH serving cell (PUSCH-servingcellconfig) / configuration for the maximum number of MIMO layers) (maxMIMO-layer, etc.) / codebook subset (codebooksubset) / maximum rank (maxrank), etc.
  • the configuration information includes multiple uplink TCI states for uplink (ie, PUSCH) transmission to multiple TRPs (ie, information about multiple reference signals having a QCL relationship with DMRS of PUSCH) or multiple spatial relationship information ( spatial relation info) (ie, information on multiple spatial relation reference signals).
  • PUSCH transmission to each TRP may correspond to each TCI state or each spatial relationship information.
  • the terminal is based on the first TCI state or first spatial relationship information, the first transmission time point (TO) (s) (that is, one or more of the plurality of transmission time points (TO) of the whole
  • the PUSCH is transmitted in the TO group including the TO), and the UE transmits the second transmission time point (TO)(s) among the plurality of transmission time points (TO) based on the second TCI state or the second spatial relationship information ( That is, the PUSCH may be transmitted in a TO group including one or more TOs.
  • the base station transmits DCI for PUSCH scheduling to the terminal (S1002).
  • the DCI may be transmitted through a control channel (eg, PDCCH, etc.).
  • the DCI is (indicated) information (eg, TCI field) for the TCI state / resource allocation information (eg, bandwidth) for the TCI state / data channel (eg, PDSCH / PUSCH) It may include resource allocation information (ie, space/frequency/time resources) and the like.
  • the DCI is the SRI field / It may include a precoding information and number of layers field (or a TPMI field).
  • the UE may determine a PUSCH transmission precoder based on an SRS resource indicator (SRI), a transmission precoding matrix indicator (TPMI), and a transmission rank.
  • SRI SRS resource indicator
  • TPMI transmission precoding matrix indicator
  • transmission rank may be given by an SRS resource indicator field and a precoding information and number of layers field in DCI, respectively.
  • one of 2 (or 4) SRS resources defined in one SRS resource set is indicated through the 1 (or 2) bit SRI field of DCI.
  • the UE may transmit an SRS to the network.
  • the SRI indicated in slot n by the DCI is related to the most recent transmission of the SRS resource identified by the SRI (ie, the most recent before the PDCCH carrying the DCI).
  • the terminal is given by the DCI (ie, precoding information and number of layers) by the field
  • a PUSCH may be transmitted to the network by applying a specific precoding matrix indicated from a codebook predetermined according to a given) TPMI and a transmission rank.
  • the precoding vector indicated / set by the TPMI in DCI may be divided into a plurality of groups (eg, group 0 / group 1) based on a predefined rule, and each group is the PUSCH of each TRP It can be applied to TO.
  • the predefined rule may be determined based on a codebook subset setting (eg, partial coherent/non-coherent, etc.).
  • the predefined rule may be based on the method described in Embodiment 1/Embodiment 1-1/Embodiment 1-2 described above.
  • the base station receives the PUSCH from the terminal (S1003).
  • the rank/precoder (or beam) may be applied to transmit the PUSCH.
  • the PUSCH may be transmitted on a plurality of transmission time points (TOs).
  • the plurality of transmission time points may be divided into N TO groups corresponding to each TRP (that is, each TO group includes one or more TOs), and different uplink TCI states for PUSCH transmission for each TO group
  • spatial relation information may be used.
  • the PUSCH transmitted in each TO group is the PUSCH may be transmitted based on the precoding vector group associated with the TO group in which the is transmitted.
  • the precoding vector group may be determined as one or more precoding vectors (ie, column vectors and/or row vectors) constituting a precoding matrix determined according to TPMI and/or transmission rank.
  • the precoding vector group may be determined as one or more precoding vectors among precoding vectors for each layer constituting the precoding matrix. For example, in the case of PUSCH transmission of rank 4 in 2 TRP, PUSCH transmitted in the first TO group (transmission in the first TRP or transmission according to the first UL TCI state or transmission according to the first spatial relationship information)
  • the precoding vector group applied to may include a first column vector (ie, a column vector for the first layer) and a second column vector (ie, a column vector for the second layer).
  • the precoding vector group applied to the PUSCH (transmission to the second TRP or transmission according to the second UL TCI state or transmission according to the second spatial relationship information) transmitted in the second TO group is the third column vector (that is, It may consist of a column vector for the third layer) and a fourth column vector (ie, a column vector for the fourth layer).
  • the first precoding vector group applied to the PUSCH (transmission to the first TRP or transmission according to the first UL TCI state or transmission according to the first spatial relationship information) transmitted in the first TO group is the first From the precoding vector for the layer, ceil (transmission rank/2 indicated by DCI) may be determined as the precoding vector for the layer (ceil(x) is the smallest integer not less than x).
  • the second precoding vector group applied to the PUSCH (transmission according to the second TRP or transmission according to the second UL TCI state or transmission according to the second spatial relationship information) transmitted in the second TO group is a precoding vector group for the remaining layers. It may be determined as a coding vector.
  • the precoding vector group is determined as one or more precoding vectors in which an element for a predetermined antenna port has a non-zero value among precoding vectors for each layer constituting the precoding matrix.
  • precoding vector group may be composed of column vectors having non-zero values in the first and third row elements (ie, elements for the first and third antenna ports).
  • the precoding vector group applied to the PUSCH (transmission to the second TRP or transmission according to the second UL TCI state or transmission according to the second spatial relationship information) transmitted in the second TO group is the second and fourth row elements (ie, elements for the 2nd and 4th antenna ports) may be composed of a non-zero value as a column vector.
  • the precoding vector group may be determined as precoding vectors for all layers in the precoding matrix in which elements for some antenna ports in the precoding matrix are reset to 0.
  • the PUSCH transmitted in the first TO group transmission according to the first TRP or transmission according to the first UL TCI state or transmission according to the first spatial relationship information
  • the first precoding vector group includes all column vectors ( That is, it may be composed of precoding vectors for all layers).
  • the second precoding vector group applied to the PUSCH (transmission according to the second TRP or transmission according to the second UL TCI state or transmission according to the second spatial relationship information) transmitted in the second TO group is indicated by DCI
  • All column vectors (ie, precoding vectors for all layers) in the precoding matrix in which the 3rd and 4th row elements in the precoding matrix (ie, the elements for the 3rd and 4th antenna ports) are reset to zero can be composed of
  • the precoding vector group includes the precoding vector for the first layer in which elements for some antenna ports in the precoding matrix are reset to 0 and the remaining antenna ports.
  • An element may be determined as a precoding vector for the second layer reset to 0. That is, elements reset to 0 for each layer may not overlap or overlap.
  • the precoding vector group applied to the PUSCH transmission according to the second TRP or transmission according to the second UL TCI state or transmission according to the second spatial relationship information
  • transmitted to a specific TO group is in the first and second rows 1st column vector (i.e. precoding vector for 1st layer) with elements (i.e.
  • row elements for 1st and 2nd antenna ports reset to zero and 3rd and 4th row elements (i.e. 3rd row elements) and a second column vector (ie, a precoding vector for the second layer) in which the row element for the fourth antenna port) is reset to zero.
  • the PUSCH may be transmitted based on a precoding vector for a single layer in a precoding vector group associated with a TO group in which the PUSCH is transmitted.
  • the precoding vector for the single layer for each TO in which the PUSCH is transmitted in the TO group may be sequentially and circularly applied in the precoding vector group.
  • two or more rank I precoders may be divided into precoders for each layer and sequentially applied to PUSCH TO to transmit PUSCH in a single layer.
  • One precoding vector group may be composed of first and second column vectors (ie, precoding vectors for the first and second layers) in the precoding matrix indicated by DCI.
  • the first and second column vectors may be alternately applied to the PUSCH transmitted in the first TO group for each TO.
  • the second precoding vector group applied to the PUSCH (transmission to the second TRP or transmission according to the second UL TCI state or transmission according to the second spatial relationship information) transmitted in the second TO group is indicated by DCI It may be composed of 3rd and 4th column vectors (ie, precoding vectors for the 3rd and 4th layers) in the precoding matrix.
  • the third and fourth column vectors may be alternately applied to the PUSCH transmitted in the second TO group for each TO.
  • power for all antenna ports of the precoding matrix may be equally distributed to antenna ports corresponding to non-zero elements in the precoding vector group.
  • the UE may transmit the PUSCH by distributing power for each port/rank based on the method of Embodiment 3 described above.
  • FIG. 11 illustrates a block diagram of a wireless communication device according to an embodiment of the present disclosure.
  • the first wireless device 100 and the second wireless device 200 may transmit/receive wireless signals through various wireless access technologies (eg, LTE, NR).
  • various wireless access technologies eg, LTE, NR.
  • the first wireless device 100 includes one or more processors 102 and one or more memories 104 , and may further include one or more transceivers 106 and/or one or more antennas 108 .
  • the processor 102 controls the memory 104 and/or the transceiver 106 and may be configured to implement the descriptions, functions, procedures, suggestions, methods, and/or operational flowcharts disclosed in this disclosure.
  • the processor 102 may process information in the memory 104 to generate first information/signal, and then transmit a wireless signal including the first information/signal through the transceiver 106 .
  • the processor 102 may receive the radio signal including the second information/signal through the transceiver 106 , and then store information obtained from signal processing of the second information/signal in the memory 104 .
  • the memory 104 may be connected to the processor 102 and may store various information related to the operation of the processor 102 .
  • memory 104 may provide instructions for performing some or all of the processes controlled by processor 102 , or for performing descriptions, functions, procedures, suggestions, methods, and/or operational flowcharts disclosed herein. may store software code including
  • the processor 102 and the memory 104 may be part of a communication modem/circuit/chip designed to implement a wireless communication technology (eg, LTE, NR).
  • a wireless communication technology eg, LTE, NR
  • the transceiver 106 may be coupled to the processor 102 , and may transmit and/or receive wireless signals via one or more antennas 108 .
  • the transceiver 106 may include a transmitter and/or a receiver.
  • the transceiver 106 may be used interchangeably with a radio frequency (RF) unit.
  • RF radio frequency
  • a wireless device may refer to a communication modem/circuit/chip.
  • the second wireless device 200 includes one or more processors 202 , one or more memories 204 , and may further include one or more transceivers 206 and/or one or more antennas 208 .
  • the processor 202 controls the memory 204 and/or the transceiver 206 , and may be configured to implement the descriptions, functions, procedures, proposals, methods, and/or operational flowcharts disclosed in this disclosure.
  • the processor 202 may process the information in the memory 204 to generate third information/signal, and then transmit a wireless signal including the third information/signal through the transceiver 206 .
  • the processor 202 may receive the radio signal including the fourth information/signal through the transceiver 206 , and then store information obtained from signal processing of the fourth information/signal in the memory 204 .
  • the memory 204 may be connected to the processor 202 and may store various information related to the operation of the processor 202 .
  • the memory 204 may provide instructions for performing some or all of the processes controlled by the processor 202 , or for performing the descriptions, functions, procedures, suggestions, methods, and/or operational flowcharts disclosed in this disclosure. may store software code including
  • the processor 202 and the memory 204 may be part of a communication modem/circuit/chip designed to implement a wireless communication technology (eg, LTE, NR).
  • a wireless communication technology eg, LTE, NR
  • the transceiver 206 may be coupled to the processor 202 and may transmit and/or receive wireless signals via one or more antennas 208 .
  • the transceiver 206 may include a transmitter and/or a receiver.
  • the transceiver 206 may be used interchangeably with an RF unit.
  • a wireless device may refer to a communication modem/circuit/chip.
  • one or more protocol layers may be implemented by one or more processors 102 , 202 .
  • one or more processors 102 , 202 may implement one or more layers (eg, functional layers such as PHY, MAC, RLC, PDCP, RRC, SDAP).
  • the one or more processors 102 and 202 are configured to process one or more Protocol Data Units (PDUs) and/or one or more Service Data Units (SDUs) according to the description, function, procedure, proposal, method, and/or operational flowcharts disclosed in the present disclosure.
  • PDUs Protocol Data Units
  • SDUs Service Data Units
  • One or more processors 102 , 202 may generate messages, control information, data, or information according to the description, function, procedure, proposal, method, and/or flow charts disclosed in this disclosure.
  • the one or more processors 102, 202 may transmit a signal (eg, a baseband signal) including a PDU, SDU, message, control information, data or information according to a function, procedure, proposal and/or method disclosed in the present disclosure. generated and provided to one or more transceivers (106, 206).
  • the one or more processors 102 , 202 may receive signals (eg, baseband signals) from one or more transceivers 106 , 206 , the descriptions, functions, procedures, proposals, methods and/or methods disclosed in this disclosure.
  • PDU, SDU, message, control information, data or information may be obtained according to the operation flowcharts.
  • One or more processors 102, 202 may be referred to as a controller, microcontroller, microprocessor, or microcomputer.
  • One or more processors 102 , 202 may be implemented by hardware, firmware, software, or a combination thereof.
  • ASICs Application Specific Integrated Circuits
  • DSPs Digital Signal Processors
  • DSPDs Digital Signal Processing Devices
  • PLDs Programmable Logic Devices
  • FPGAs Field Programmable Gate Arrays
  • the descriptions, functions, procedures, proposals, methods, and/or flowcharts of operations disclosed in this disclosure may be implemented using firmware or software, and the firmware or software may be implemented to include modules, procedures, functions, and the like.
  • the descriptions, functions, procedures, proposals, methods, and/or flowcharts of operations disclosed in the present disclosure may include firmware or software configured to perform one or more processors 102 , 202 , or stored in one or more memories 104 , 204 . It may be driven by the above processors 102 and 202 .
  • the descriptions, functions, procedures, suggestions, methods, and/or flowcharts of operations disclosed in this disclosure may be implemented using firmware or software in the form of code, instructions, and/or a set of instructions.
  • One or more memories 104 , 204 may be coupled with one or more processors 102 , 202 , and may store various forms of data, signals, messages, information, programs, code, instructions, and/or instructions.
  • the one or more memories 104 and 204 may be comprised of ROM, RAM, EPROM, flash memory, hard drives, registers, cache memory, computer readable storage media, and/or combinations thereof.
  • One or more memories 104 , 204 may be located inside and/or external to one or more processors 102 , 202 . Additionally, one or more memories 104 , 204 may be coupled to one or more processors 102 , 202 through various technologies, such as wired or wireless connections.
  • One or more transceivers 106 , 206 may transmit user data, control information, radio signals/channels, etc. referred to in the methods and/or operational flowcharts of the present disclosure, to one or more other devices.
  • the one or more transceivers 106, 206 may receive user data, control information, radio signals/channels, etc. referred to in the descriptions, functions, procedures, suggestions, methods, and/or flowcharts of operations disclosed in this disclosure, etc., from one or more other devices. have.
  • one or more transceivers 106 , 206 may be coupled to one or more processors 102 , 202 and may transmit and receive wireless signals.
  • one or more processors 102 , 202 may control one or more transceivers 106 , 206 to transmit user data, control information, or wireless signals to one or more other devices.
  • one or more processors 102 , 202 may control one or more transceivers 106 , 206 to receive user data, control information, or wireless signals from one or more other devices.
  • one or more transceivers 106 , 206 may be coupled with one or more antennas 108 , 208 , and the one or more transceivers 106 , 206 may be coupled via one or more antennas 108 , 208 to the descriptions, functions, and functions disclosed in this disclosure.
  • one or more antennas may be a plurality of physical antennas or a plurality of logical antennas (eg, antenna ports).
  • the one or more transceivers 106, 206 convert the received radio signal/channel, etc. from the RF band signal to process the received user data, control information, radio signal/channel, etc. using the one or more processors 102, 202. It can be converted into a baseband signal.
  • One or more transceivers 106 , 206 may convert user data, control information, radio signals/channels, etc. processed using one or more processors 102 , 202 from baseband signals to RF band signals.
  • one or more transceivers 106 , 206 may include (analog) oscillators and/or filters.
  • the scope of the present disclosure includes software or machine-executable instructions (eg, operating system, application, firmware, program, etc.) that cause operation according to the method of various embodiments to be executed on a device or computer, and such software or and non-transitory computer-readable media in which instructions and the like are stored and executable on a device or computer.
  • Instructions that may be used to program a processing system to perform features described in this disclosure may be stored on/in a storage medium or computer-readable storage medium, and may be viewed using a computer program product including such storage medium.
  • Features described in the disclosure may be implemented.
  • Storage media may include, but are not limited to, high-speed random access memory such as DRAM, SRAM, DDR RAM or other random access solid state memory device, one or more magnetic disk storage devices, optical disk storage devices, flash memory devices, or may include non-volatile memory, such as other non-volatile solid state storage devices.
  • the memory optionally includes one or more storage devices located remotely from the processor(s).
  • the memory or alternatively the non-volatile memory device(s) within the memory includes a non-transitory computer-readable storage medium.
  • Features described in this disclosure may be stored on any one of the machine-readable media to control hardware of a processing system, causing the processing system to interact with other mechanisms that utilize results in accordance with embodiments of the present disclosure. It may be incorporated into software and/or firmware.
  • Such software or firmware may include, but is not limited to, application code, device drivers, operating systems, and execution environments/containers.
  • the wireless communication technology implemented in the wireless devices 100 and 200 of the present disclosure may include a narrowband Internet of Things for low-power communication as well as LTE, NR, and 6G.
  • NB-IoT technology may be an example of LPWAN (Low Power Wide Area Network) technology, and may be implemented in standards such as LTE Cat NB1 and/or LTE Cat NB2, and is limited to the above-mentioned names. no.
  • the wireless communication technology implemented in the wireless devices (XXX, YYY) of the present disclosure may perform communication based on LTE-M technology.
  • the LTE-M technology may be an example of an LPWAN technology, and may be called various names such as enhanced machine type communication (eMTC).
  • eMTC enhanced machine type communication
  • LTE-M technology is 1) LTE CAT 0, 2) LTE Cat M1, 3) LTE Cat M2, 4) LTE non-BL (non-Bandwidth Limited), 5) LTE-MTC, 6) LTE Machine Type Communication, and/or 7) may be implemented in at least one of various standards such as LTE M, and is not limited to the above-described name.
  • the wireless communication technology implemented in the wireless device (XXX, YYY) of the present disclosure is at least one of ZigBee, Bluetooth, and Low Power Wide Area Network (LPWAN) in consideration of low power communication. It may include any one, and is not limited to the above-mentioned names.
  • the ZigBee technology can create PAN (personal area networks) related to small/low-power digital communication based on various standards such as IEEE 802.15.4, and can be called by various names.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • Mathematical Physics (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention porte sur un procédé et sur un appareil permettant de transmettre et de recevoir un canal de liaison montante dans un système de communication sans fil. Un procédé permettant de transmettre un canal partagé de liaison montante physique (PUSCH) selon un mode de réalisation de la présente invention peut comprendre les étapes consistant : à recevoir des informations de commande de liaison descendante (DCI) pour une planification de canal PUSCH en provenance d'une station de base ; et à transmettre le canal PUSCH à la station de base sur la base d'un indicateur de matrice de précodage de transmission (TPMI) et d'un rang de transmission donné par les informations DCI. Le canal PUSCH est transmis dans une pluralité d'occasions de transmission (TO), la pluralité d'occasions TO étant composées de N (N étant un nombre naturel) groupes d'occasions TO comprenant une ou plusieurs occasions TO, le canal PUSCH est transmis sur la base d'un groupe de vecteurs de précodage associé à un groupe d'occasions TO dans lequel le canal PUSCH est transmis, et le groupe de vecteurs de précodage peut être déterminé comme étant un ou plusieurs vecteurs de précodage constituant une matrice de précodage indiquée par l'indicateur TPMI.
PCT/KR2021/008001 2020-06-30 2021-06-25 Procédé et appareil permettant de transmettre et de recevoir un canal de liaison montante dans un système de communication sans fil Ceased WO2022005114A1 (fr)

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